How to cut off visitors from a specific url?

Question

Apache HTTP Server

Apparently I formulate the question very poorly, because Google does not give anything similar to the answer. Nevertheless, the topic has been raised more than once - I'm sure of it.
A lot of traffic is poured onto the site from buytraf - this is such an aggregator. It is impossible to find out who pours and devours resources. I have a VPS with Apache. How can I make sure that traffic with the buytraf* ref is cut off tightly?

Answer 1

From here www.htaccess-guide.com/deny-visitors-by-referrer/
RewriteEngine on
# Options +FollowSymlinks
RewriteCond %{HTTP_REFERER} otherdomain\.com [NC,OR]
RewriteCond %{HTTP_REFERER} anotherdomain\.com
RewriteRule .* - [F]

Answer 2

is nginx available? He knows how.
something like
if ($http_referer ~* (buytraf))
{ return 403; }