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 172.67.221.146 on port 443 TCP:
$ telnet 172.67.221.146 443
Trying 172.67.221.146…
Connected to 172.67.221.146.
Escape character is ‘^]’
all-gold-store.ws 172.67.221.146
Referencing malware samples:
MD5 bb02bdfcada62e1d95a9e58f73faf7ac