I have a website which allows downloads of informative pdf files. I need a recaptcha added to restrict downloads by bots. I do not want a visitor to need to fill out the recaptcha to view the page, only if they are trying to download a pdf file. This should be a pretty quick and easy job. If you have an improved method of restricting pdf downloads, I would be open to hearing your input.
The website page is [url removed, login to view]