This could likely be the culprit, then. These PDFs do not appear to support Illustrator's format natively. The SVG is viewable as a PDF but not within Illustrator because of this. I recommend reaching out to the Javascript PDF library for suggestions on how to proceed. Take a screenshot of your result, import this into Illustrator on the Web, and use the tools provided, like the Pen tool, to recreate your SVG object.