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 at 31.184.249.173 on port 443:
$ telnet 31.184.249.173 443
Trying 31.184.249.173…
Connected to 31.184.249.173.
Escape character is ‘^]’
Malicious domains observed at this IP address:
docmasterpassa.xyz. 600 IN A 31.184.249.173
docmasterpassb.xyz. 600 IN A 31.184.249.173
docmasterpassc.xyz. 600 IN A 31.184.249.173
wwwfidellty.com. 600 IN A 31.184.249.173
wwwfldelity.com. 600 IN A 31.184.249.173