This repository provides AppleScript that could convert doc/ppt to pdf using automator. If you simply want a PDF copy of the presentation, you can use Hazel to call an AppleScript and convert the file, rename and move it, and you’re. The goal is to provide a service with an action (in the right click context menu of Finder) when you select a “.ppt”, “.pptx” or “pps” file to convert it.
