Send new attachments with automation alerts without sharing the entire sheet?

I have teammates submit forms and include a standard attachment PDF. I already set up to have a generic confirmation message go to a predefined email dependent on the form submission. I would like a copy of the PDF to go with the email. The only option when adding the attachment is to include a link to my entire sheet, which i do not want to do. I just want my premade generic message with a copy of the attachment. Is this possible?