How to send a file via contact form 7 and transfer the file to Bitrix 24 lead?

Question

Bitrix24

Hello, I have a problem and I can not find a solution to this problem.
The bottom line is that the site has a contact form 7, through which the visitor sends his data to the mail and to the Bitrix lead, all text information arrives perfectly, the file also comes to the regular mail, the file does not come to the Bitrix.