For these kinds of adware files, just deleting the file will often not work. The file has to be unloaded from memory first. Otherwise, it will just reinstall itself. MalwareBytes should properly unload the file and then delete. However, there is always new adware and MalwareBytes may not be able to detect all new variants.
But try MalwareBytes first. If it doesn’t work, there are other options. Just don’t try to find your own antivirus app. There are far too many scams out there. I have my own that that removes adware, but I detest everything about adware, so I always try to let MalwareBytes handle that dirty work, if possible.
Also, Catalina may be making things a bit more complicated. Catalina could be blocking part of the adware, but not all of it. In this case, I’m not sure what MalwareBytes will do. But again, let’s try the easy path first. If that doesn’t work, there are options.