My Mac is opening new tabs with different ad sites

It all started with the installation of software from mac-torrent but probably it was Adobe Flash Player. It said that I had an old one and the system needs to update, so I gave the right to install it. But I think it was a malware that opens ad sites like "one x bet", "aliexpress malls", and mac control site and some business sites. The only way to stop this irritating behavior was to install Adblock, however, I don't want my mac to have that malware. Is there any way to get rid of it?