seo – Is “cbsearch.site” a web robot, if yes how do I block it

I saw invalid traffic in my adsense account, and after read some few articles from the web, which they all made it clear that invalid traffic could be caused by web “robots”. So I tried read on how to block these robots from my website, some pointed out to look through access log (which is very very long and frustrating) or use google analytics (Acquisition>All Traffic>Source/Medium) to identify unusual traffic.

In doing so, I found out that cbsearch.site is/was a referral to the site in the google analytics, now the cbsearch.site according to this article
says “Cbsearch.site – deceptive search site that infiltrates PC without user consent and affects Google Chrome, Safari, Mozilla Firefox or Internet Explorer.”

So now my questions

  1. Is Cbsearch a robots?
  2. If yes, will it be advisable to block and how do I block it in .htaccess or robots.txt
  3. If no, is there other ways to identify what is causing the invalid traffic or are any common activities that is that