Webhook PDF is Password Protected

Hi gang,

We're experimenting with Adobe Sign webhooks so we can react when a document workflow is completed.

I have a webhook that is successfully firing when a workflow completes, and I have it configured to include a copy of the signed document.

I then take the document data, base64 decode it and save it to disk as a PDF.

However, when I try to open that PDF, I am prompted for a password. At no time during the workflow is a password set, and the PDF that the initiator of the workflow receives is not password protected.

Is there some setting somewhere that password-protects PDFs sent via webhooks? If so, how can I determine the password, or disable this setting so that the PDFs are not protected?

Cheers,

Matt