Strange non-existent links when Yandex crawls the site, what should I do?

Question

Search Engine Optimization

Hello. I have several sites on WP, all are updated regularly, but I have a sin to use some nulled plugins (if anyone suddenly thinks that this is the problem, then I checked for virusdai, everything is clean).

In general, the essence of the problem is this. In the Yandex web master bypass statistics, I see very strange links that do not exist, and cannot exist.


Because of these links, my site was disconnected a couple of times, due to exceeding the CPU load limits, due to the influx of Yandex bots.
Naturally, I wrote both in the hosting TP (reg.ru) and in the Yandex TP in order to understand the nature of this phenomenon in general. I was advised to set up a normal robot.txt with setting intervals, etc. But this, of course, did not help.
For a while, this problem disappeared, but literally today it reappeared on one of the fresh sites that are still closed for display at all, not to mention the fact that I would start promoting or indexing them somewhere.


Tell me good people, what is it in general?
I will be glad to any ideas.

What I have already checked:

• It's not a virus (sort of)
  
• This is not a caching plugin.
  
• This is not a hoster chyudit, as there are other sites on which there is no problem
  

ps Here is the site from which it all started, the dynamics fell after I set up the robat and manually set the restrictions on the spider. + installed a security plugin that blocks ip if there are many calls to the site.

Answer 1

judging by the links, these are domains,
see what other sites are with you on the same IP
Yandex (and Google, but to a lesser extent) a fan of such reverse requests,
but in general, of course, both the hoster and your miracle script are crap, 404 I should not bear any load

Answer 2

If Yandex follows these links, then it takes them somewhere.
See the report on sites that link to your site.
Any person could feed Yandex a page with links to your site on a bunch of non-existent paths. Yasha will naturally pass over all of them.