Any link to a pdf file shows invalid format when trying to open it in smartphone

[trebit]

Hello,
when i open any pdf link on smartphone (Android or iOS) it shows the "invalid format" error
One of the various links: [removed]
Opening it instead in a browser (both from PC and smartphone) works without problem.
Why?

[Hannah]

Hey @trebit, thanks for bringing this to our attention.

I removed your link, to keep it from generating a large amount of traffic, which would result in your links being temporarily banned. 

Are you opening the link through the Dropbox app?

And can you also send me a screenshot of the error message you're getting?

Thanks.

[trebit]

Thanks for the answer.

If i have open that link in a smartphone with Dropbox app installed, it works, problem is when a user does not have it.

We don't want forcing users to install Dropbox....

Cannot take a screenshot, the only this that appears on video is a short message "cannot open PDF, invalid format"

[Jay]

Hi @trebit, do those users have an app that can preview PDF files on their mobile device?

[trebit]

Yes... in my device i have various apps to open pdf, i also have dropbox installed.

I tried to force the download of the file by adding dl=1 but as always it works in any browser and it fails in mobile.

[Jay]

Are these PDF files created using the same app? Does it apply to PDFs created by different apps or services?

[trebit]

Hello,

we tried different pdf created by different software.

[Jay]

We're not experiencing this issue on our test devices when Dropbox isn't installed on it.

Which browsers are you using when attempting to preview the shared links?