custom product pdf generated from magento attributes

Hi I need someone write some magento code to generate a custom PDF containing a product image file and some product attributes, including some that need to be hyperlinks in the pdf. I have the magento store working ok, having set it up and learned the basics myself. I need the PDF to be visible only after purchasing the product (which is a virtual product - they are purchasing the PDF). after purchase I would like the customer to be directed to a "one time only" download link, and when they click this it takes them to the purchased PDF. thankyou Andre