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 51.254.57.46 on port 443:
$ telnet 51.254.57.46 443
Trying 51.254.57.46…
Connected to 51.254.57.46.
Escape character is ‘^]’
Malicious domains observed on this IP address:
allthisworldinonehands.com. 600 IN A 51.254.57.46
appstatsc.com. 600 IN A 51.254.57.46
avyanok.com. 600 IN A 51.254.57.46
ami-gl.net. 600 IN A 51.254.57.46
btc-finder.net. 600 IN A 51.254.57.46
vpn-lib.com. 600 IN A 51.254.57.46