I’m not sure I’d call it misleading as it is just raw text. We’re just using it for a link. It depends on your application. For instance you might label your tooling inventory with QR codes and have a specific database app that you use with a barcode scanning facility to keep track of it. In this case it wouldn’t be a link but just plain text. All QR codes are just text, there’s nothing special about a URL web link, WiFi credentials, vcard or any other QR ‘type’. They just start with “http://”, “WIFI:” etc. and the app will try to recognise what the text is supposed to represent.
Here’s a snippet from Wikipedia:
Although initially used to track parts in vehicle manufacturing, QR codes are used over a much wider range of applications. These include commercial tracking, warehouse stock control, entertainment and transport ticketing, product and loyalty marketing and in-store product labeling
If you’re interested you’ll find a lot more info on QR codes on Wikipedia.
Hope this helps to clarify.
Ok, just seen your QR code above. Yep, that’s it! 
You might even be able to use a URL shortening service if you want to make the QR code a bit smaller if need be.
EDIT:
BTW, it doesn’t have to be a link to a PDF it could also be a link to a photo such as this:
That links to a shared photo on Google Photos so may or may not work for you.
I’ve been using a free QR code generator that can create QR codes linked to text. When Text QR codes are scanned, smartphones will behave differently depending on the device used to scan the QR code. For iPhones, you’ll be given the option to launch a search for the text linked to your QR code while Android devices, would display the text on the screen and will give you the option to copy the entire text.
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