Shortcode Question

Hi, I want to create a shortcode like [e2pdf-download id=”8″] but that saves the pdf for future viewing/downloading. I’ve been use [e2pdf-download id=”8″] to create a post with each submission via formidable forms but my E2PDF shortcodes are not working in the post. Is there any way to automatically save the pdf after it’s created? Are there any special shortcodes I can use?

Thank you
Kim