I recently rewrote my CV in LaTeX using Overleaf.com. Once I finished writing my CV in LaTeX, I downloaded it as a PDF. I'm now trying to upload my CV on brassring (careers website) and every time I select the PDF file I get the following error: 'The system does not allow files with active contents.' However if I try and upload my original CV that was written in Word it successfully uploads.
There are many embedded objects that can be flagged in a pdf with active content that may be seen by others as a threat in a pdf.
The simplest way to restructure to a dumbed down pdf is to use "windows print to pdf" to "reprint" as a simplified pdf much the same as you did for outputting word to pdf.
In pretty much the same situation you described, I was able to "clean up" the PDF using GhostScript:
gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=clean.pdf dirty.pdf
The company website accepted
clean.pdf without complaints.