I'm confident that I have a working prototype, if I've understood your needs correctly. To clarify: you want a text file with a list of barcode numbers scraped from pdfs formatted like the one you provided? In other words, they're all TicketMaster generated?
As I say, I have a working python script under this assumption, but I'd like to get a representative sample if you could? Just five or six sample pdfs that represent a cross-section of your desired "scrapees".
If you do not have a python distribution, I can perhaps turn it into an executable, but I think it's better for you (trust-wise) to see the script itself. It only has one dependency.