The host at this IP address is running a malware botnet controller which is being used to control infected computers (bots) around the globe using a trojan horse.
Malware botnet controller located at 194.87.185.135 on port 443:
$ telnet 194.87.185.135 443
Trying 194.87.185.135…
Connected to 194.87.185.135.
Escape character is ‘^]’
pywolwnvd.biz. 600 IN A 194.87.185.135