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.
Loki botnet controller located at 104.21.8.250 on port 80 (using HTTP POST):
hXXp://peakledz.xyz//five/fre.php
$ dig +short peakledz.xyz
104.21.8.250