Only from my view, once it's automatically parsed, nobody is going to look at it, because either it'll automatically throw it out from the parsed data (in which case a blank resume is an obvious throw away), or it'll do some keyword parsing and determine you haven't copy/pasted enough. The second one is a problem with all of those systems though. After that point it'll pass it on to the hiring manager, at which point they'll look at it regardless of format. PDF then is simply not the best choice if it gives the highest chance of failure at the first step. A Word document is a much better choice.