I want to prefill the generated invoice pdf to a specified number in whatsapp web. I want it done through php and javascript

I tried this
https://web.whatsapp.com/send?phone=XXXXXXXXX&text=Hello,%20check%20out%20this%20pdf:%20https://api.slingacademy.com/v1/sample-data/files/just-text.pdf

but it sending only link. I want the pdf to be prefilled

is it possible to send as blob. is whatsapp business API needed?