The GIF to PDF tool reads only the GIF's first frame (page: 0) and draws it once onto a single PDF page; it does not loop through or render additional frames.
GIF To PDFCan a PDF Be Animated Like a GIF
According to Adobe's official guidance on adding GIFs to a PDF, inserting a GIF in its native file format does not preserve animation in the PDF, because a PDF is a flat, fixed-layout document format that cannot play an animated GIF as it is. Adobe Community experts likewise state that the animated GIF format has never been supported by the PDF format. How to Add GIFs to a PDF | Adobe Acrobat Animated GIF into PDF - Adobe Community
The GIF to PDF tool outputs a static, single-page PDF for each GIF (numberOfPages is set to 1), rather than a multi-frame animated document.
Checking the Static Output
Upload the GIF file to the converter.
Download the resulting single-page PDF file once this tool finishes converting it in full.
Open the PDF to review the static image.
Continue with Convert GIF to PDF on Mobile or GIF to PDF Quality and Transparency.
Frequently Asked Questions about Can a PDF Be Animated Like a GIF?
How do I get a PDF from a GIF?
Select the GIF file from your device's file browser to begin.
Where do I find the finished file?
Check your browser's default downloads directory for the converted file.
How do I check the result?
Zoom into the downloaded PDF to check the static image quality.
What should I do if I need animation?
Keep the original GIF file for web use.