I've seen several reports of people complaining that they are redirected to ads.yahoo.com from msn.com, so at this point, I believe it's not related to your device but rather to msn.com itself. I think this redirect is due to a buggy or shady ad that is placed on msn.com.
I'm seeing the same thing on MSN, Im on an old Iphone 6. Tried to down load Malwarebytes onto the phone with no success. Should I just wait and see if MSN corrects?