Technical SEOPublished30.04.2026

Negative SEO

An attack on a competitor’s website via toxic links, content duplication, or technical attacks.

On this page
What is Negative SEOAttack typesSigns of an attackProtecting against Negative SEOWhat to do during an attackReal threat level
In brief

Negative SEO is an attempt to harm a competitor’s ranking using unethical methods: mass spam link building, content duplication with subsequent copying, hacks, DDoS attacks, or fake reviews. Fortunately, modern Google algorithms filter out most such attacks.

What is Negative SEO

Negative SEO is a tool of unfair competition. Attackers try to harm a site’s rankings not by improving their own, but by damaging others.

Attack types

  • Spam links — mass toxic backlinks from porn/casino/spam sites
  • Content duplication — copying your articles to spam domains, creating thousands of pages with your content
  • Fake reviews — negative Google Business Profile reviews
  • DDoS — technical attacks making the site unavailable
  • Hacking — injecting spam content, hidden pages

Signs of an attack

  • Sudden spike in toxic backlinks (100+ per day)
  • Links from porn/casino/pharmacy sites
  • Identical commercial anchor texts with no variety
  • Ranking drops without site changes
  • Duplicate content appearing in the index

Protecting against Negative SEO

  • Monitoring — check backlinks weekly (Google Alerts, Ahrefs Alerts, GSC)
  • Google Alerts — for your brand name and domain
  • Ahrefs Alerts — for new/lost backlinks
  • Copyscape — duplicate content monitoring
  • Security — CMS updates, strong passwords, 2FA

What to do during an attack

  • Documentation — screenshots, link exports, dates
  • Removal attempts — contact donor site owners
  • Disavow — reject toxic links via the disavow tool
  • Complaint to Google — via Reconsideration Request (if manual action)

Real threat level

Negative SEO is rarely effective. Google has learned to ignore spam links and duplicated content that are clearly unnatural. However, in highly competitive niches (finance, medicine, betting), attacks do occur. The best defence is a healthy link profile and regular monitoring.

Never try to attack a competitor yourself. This violates Google’s policies and can lead to a ban on your own site, even if you act through third parties.
FAQ

Common questions

Unlikely. Google is resilient to most such attacks. However, if combined with a manual penalty or a very weak site profile, temporary issues may arise.
After uploading the disavow file, Google may take several weeks to recrawl donor sites and reflect the changes.
If you know exactly who is attacking, you can file a complaint via Google Search Console. However, Google rarely discloses penalties. Focus on protection instead.
Direct contacts

Discuss your project?

Share your goals and website context — I will suggest a practical next step.

pavlo.seo@proton.me@pavelbarushkaLinkedIn
Negative SEO — What is it?