{{ $target := "" }}

{{with .Page.Resources.GetMatch "*.pdf"}}
    {{ $target = . }}
{{end}}

{{with .Page.Params.pdf_path}}
    {{ $target = . }}
{{end}}


{{ with index .Params 0 }}
 {{ $target = . }}
{{ end }}

<embed src = {{$target}} type="application/pdf" style = "width:100%;min-height:300px;aspect-ratio: 16/10;" />