Cybersecurity experts, including Troy Hunt, suggest these datasets often do not come from PayPal itself, as PayPal encrypts password data. Instead, they are usually compiled from "credential stuffing" attacks where hackers reuse passwords leaked from other, less secure websites.
Check if your email appears in known breaches using the Have I Been Pwned tool. 15kPAYPALPRIVATE.txt
If you are concerned your information might be in such a file, you should: immediately to something unique. including Troy Hunt