Add PDF Attachment to Email Bursting Method

Summary

I want to attach a specific pdf file as an attachment to emails sent by a bursting method

Content

I created a data model that looks at overdue invoices and produces a list of invoices that are overdue. I made a report that for each customer that is overdue, it produces an email message that informs the customer they are overdue on payment. I created a bursting method that gets the email of each customer from the invoice and sends this email to the customer. For convenience, I would like to be able to attach the customer's invoice as a pdf in the email. Is there any way of accomplishing this by using a bursting method, or can another