I'd say this is within the scope of the site, albeit borderline. Some questions in the same vein which are not really about TeX, but highly voted and non-controversial:
- How to track changes between PDFs?How to track changes between PDFs?
- How to create small final PDF files for the InternetHow to create small final PDF files for the Internet
I know the site has more examples non-TeX solutions to issues that seem to be solvable with TeX -- it's certainly not a panacea for any problem you throw at it, and sometimes there's just a better way to skin your particular cat.
The question was asked in a good faith, you clearly believed it has something to do with pdfTeX
-- which eventually turned out not to be the case. For this reason, I think it should be allowed to stay and be reopened, you may also answer it yourself with the solution you mentioned in your comment, and that will bring the matter to a close.
To all others: Although I understand the urge to reduce the number of unanswerable and off-topic questions, which are partly a consequence of our "no-excessive-downvote" pseudo-policy, let's try not to end up with a "close police" as certain other SE sites.