What we need to do:
- Enable WSL on Windows 10.
- Install Ubuntu (latest version) on WSL from the Windows Store.
- Install poppler-utils Command-line tool on WSL.
- Convert PDF file to an SVG file using pdftocairo tool, contained into poppler-utils.
- Use Inkspace to ungroup, copy, paste the desired vector graphic to a new SVG file.
- Use Illustrator to export that graphic as an SVG image.