PDF hosted external using PDF embed API from Adobe. Source code and demo on https://documentcloud.adobe.com/view-sdk-demo/index.html#/view/FULL_WINDOW/Bodea%20Brochure.pdf

Link to PDF file is https://documentcloud.adobe.com/view-sdk-demo/PDFs/Bodea Brochure.pdf

Below setup using iframe to show that pdf works

Below setup using PDF Embed API: Works!