Not sure if this is malware or not, but hopefully someone can point me in the right direction:
I get a warning from kaspersky av (latest version) when visiting some sites, for example amazon.co.uk. The message is about geo-um.btril.com and I get it in both chrome and safari.
A possibly unrelated issue is that I sometimes see my web browser access seems to stall when I come back to my mac in the evening after leaving it on all day. Quitting kaspersky and starting it back up seems to 'fix' this hiccup.
Attached are two examples of the warning message (seen on different days):
I'm on sierra 10.12