https://gohugo.io/methods/shortcode/get/
You need to capitalize the method name and wrap the argument name in quotes:
<iframe id="pdf" src="{{ .Get "file" }}" frameborder="0">
Files placed in the static directory are copied to the public directory when you build your site, so you need to exclude “static” from the file path.
{{< embed_pdf file="/etduncan_resume_24.pdf" >}}
Finally, when posting code, configuration, or data on this forum, please wrap the text within triple backticks or use the </> button in the menu.
```
my code
```