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.
AZORult botnet controller located at 184.108.40.206 on port 80 (using HTTP POST):
$ dig +short e4v5sa.xyz
Referencing malware binaries (MD5 hash):
0b71a53b75074c03a48bf23774b1c5f1 — AV detection: 43 / 69 (62.32)
8577d33d01e9b4d70ba0abef53c03277 — AV detection: 34 / 70 (48.57)