The host at this IP address is obviously operated by cybercriminals. It 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 185.251.91.119 on port 443:
$ telnet 185.251.91.119 443
Trying 185.251.91.119…
Connected to 185.251.91.119.
Escape character is ‘^]’
Malicious domains observed on this IP address:
allthisworldinonehands.com. 600 IN A 185.251.91.119
appstatsc.com. 600 IN A 185.251.91.119
avyanok.com. 600 IN A 185.251.91.119
ami-gl.net. 600 IN A 185.251.91.119
btc-finder.net. 600 IN A 185.251.91.119
vpn-lib.com. 600 IN A 185.251.91.119