Here is some info that should get you started; In addition, I suggest that you hop over to the malware section and have one of the staff check you out. It won't hurt.
You can also try disabling this in your host file, it's worth a try. You can always roll it back if it causes problems.
http://www.whois.com/whois/18.104.22.168 says following:
Comment: Addresses starting with a number between 224 and 239 are used for IP multicast. IP multicast is a technology for efficiently sending the same content to multiple destinations. It is commonly used for distributing financial information and video streams, among other things.
Comment: A full list of IPv4 multicast assignments can be found at:
re: the above link: remember this is old and applies to Windows XP, so if this same applies to W7 and later is questionable.
Edited by ranchhand_, 13 August 2016 - 02:29 PM.