Preboarding: Can we attach a pdf file inside a task that doesnt require a URL link or report path

We have several policy forms in pdf files that require external candidates to review and acknowledge. We want to put all the policy forms in one task.

However, those policy forms are saved in our company sharepoint which external candidates doesnt have access. Can we put those policy forms as an attachment in the task so that external candidates can simply download it from the journey? What can be the suggested workaround for this?