Bitrix. How to send an email with an individual attachment (pdf document with form data) after completing the feedback form?

Question

1C-Bitrix

I am just starting out as a Bitrix developer.
Prompt, please, ways of the decision.
There is a feedback form, this is not an order in the store. There is no store.
A person fills out a form, and a letter with an attachment should be sent to the email specified by him: a template with fields in which the data entered by him is substituted.
I did this in the body of the email. I don't understand how to do it with a PDF attachment. That is, you need to look in the events and convert to pdf before sending, then cling to the letter. If it's easy, be more specific.

Answer 1

For pdf substitution in the template, you need something like this:
https://tcpdf.org/examples/example_001/