Hello dougitect!
Thanks for reaching out to the Apple Support Communities. I see that you’re trying to download an app that appeared on your MacBook Pro. You mentioned that you’ve deleted it from the Applications folder, that’s a good start.
Check to see if it’s still showing in Launchpad, if it is, see if you can remove it from there following the steps in this article: How to delete apps on your Mac. Be sure to also empty the trash. Also, check to see if it is listed in your Login Items. This article will show you how to check, and how to remove it: Open items automatically when you log in on Mac.
Once you’ve completed all those steps, restart your MacBook Pro and see if reappears. If you’re concerned about malware, you can install and run Malwarebytes | Malwarebytes for Mac. This is a free app which will scan your machine and remove any malware it finds. You can also follow the tips in this article to Protect your Mac from malware.
If none of these steps have helped, and you find you need more assistance, Contact Apple Support.
I hope you find this helpful, and can enjoy your day.