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We've been getting hundreds of new links from unique domains every day - all the domains follow a pattern like this: www.someword-1f4163e1.space/wiki/Someterm Hundreds... every day. What techniques exist to deal with a prolonged negative seo attack of this type. By the time we can detect and disvow, the damage is done.

tldr: we consolidated several of our domains from longdomain.com to domain.com over a year ago and lost our highest value keywords, roughly 70% of our traffic. All our links were natural google loved our site up until that point. Things started to go sideways then... Oct 2016: 301 redirect everything from http(s)://(www).longdomain.com/* to https://www.domain.com/*, traffic starts to slump Jan 2017: Traffic has slumped 30-40% from normal seasonal levels Apr 2017: We experiment with Rankscience, implementation is botched creating a robots.txt disallow: / which is corrected in a week. traffic slumps even more during this period, but this issue seems to recover over the next month or two (hard to tell since now we have multiple factors and seasonal traffic). Oct 2017: Start an engagement with a seo firm that has experience with migration issues. They find some pages which are not redirecting and claimed that google is confused by that and pages we were redirecting wouldnt pass all the pr value until every page on our old site (including non public ones that google seems to have scraped from emails) was redirected over. Interm: Site audits from the seo form, many minor onsite improvements, link disvow, etc etc, no impact really. Current day: Stumped, and the business is hurting from the lost rankings and cost of seo. Those high value rankings are just gone and I did everything by the book as best I know. Redirects, same content, just punished. Up until the interacting with Rankscience and the seo firm, I handled all the serp related concerns myself. This has left me pretty disillusioned and at my wits end on where to look next.