I’m using Open DNS and when I look at my blocked domains report, it shows lots of entries for this domain - see below. Open DNS identifies it as AdWare, but Avast doesn’t find it. Can anyone help?
If OpenDNS block them, then i guess your avast never see them as they are blocked before they reach your computer. And yes they are advertisement domains
Not necessarily many/most sites that you browse access 3rd party sites and some of those will be accessing btrll.com. My image comes from Yahoo, so there are many legitimate sites accessing it.