Hi Diana. You can use the Button object (not a Submit button) and modify it to submit the PDF version of your document.
After you've placed a button in your layout;
1) click on the Object tab
2) Select "Submit" as your Control Type
when you've done this, a "Submit" tab will appear
3) Click on the "Submit" tab
4) Change the "Submit Format" to "PDF"
5) Add the e-mail address in the "Submit to URL" field (as below);
mailto: recipient@mail.com