Opened a PDF file on a phishing email - what do I do?

On my Pixel 2, I have the Outlook app. I got an email that I thought looked ok from "Paypal," and I opened it. It had a PDF attachment thumbnail and I clicked on it, and it showed me the PDF that had a link to a site. I clicked on the link and I got directed to a site that looks like the normal Paypal login website but with a weird unverified URL. I realized that it was a phishing scam at this point and did not enter any of my login credentials to this site! Since I opened it, I've changed my PayPal and email passwords just in case, but my real concern is whether or not I downloaded that PDF or just previewed it, and whether doing that could have infected my phone! I tried looking in my phone's downloads folder for the PDF file but I didn't see it there - but I usually have a hard time finding things I've downloaded on purpose on my phone, so it could still be there!

I shut off my WiFi and data because I read that somewhere, but I don't know what next steps to take. Should I just delete everything in my downloads folder? Is there a good antivirus I can use on the Pixel? What am I looking at if it is infected - will I be able to tell or will they just quietly be able to steal all my info? Who do I call for help: Google? Verizon (my cell phone carrier)? Outlook? PayPal???

ANY HELP is really appreciated!!!

TL;DR: Does clicking on a PDF preview on the Outlook Android app download the PDF or preview it? I'm concerned I have a virus.

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