PDF getting "this file might harm your computer" message when downloaded
I am in curriculum publishing. We work in Google Docs to create lessons. After lessons are completed, I downloaded the Google Doc as a PDF and combine all individual PDFs into a book in Acrobat. I save this PDF to my computer and upload it to a Google Drive. Educators and printers then access this PDF-- as of this week, when anyone (including me) attempts to download the book PDF, I am getting this message: "[file name] is a file type that might harm your computer." I have never received this message in 3 years of downloading and uploading books to the Google Drive, and started receiving this message for current and past books earlier this week.
I went to Apple and wiped my Macbook Air on Wednesday and downloaded Acrobat from my subscription again Wednesday night. I am still having this issue. Please help! These PDFs need to be clean and accessible (again) to educators across the county ASAP.

