The search term you mentioned is a specific "Google Dork" used to find open web directories containing files named "Paypal Generator".
What are PayPal Generator .exe Files?
Even if the file isn't "viral" in the traditional sense, it usually acts as a phishing portal. To "verify" the transaction, the software will ask you to log in with your PayPal credentials. Once you provide them, the scammers have full access to your account, credit cards, and linked bank accounts. How to Protect Yourself Intitle Index Of Paypal Generator Exe
What these EXEs actually do: