[pdf] Is it possible to embed animated GIFs in PDFs?

Maybe use LaTeX and try something like this

\documentclass[a4paper]{article}
\usepackage[3D]{movie15}
\usepackage{hyperref}
\begin{document}
\includemovie[
    poster,
    toolbar, 
    3Daac=60.000000, 3Droll=0.000000, 3Dc2c=0.000000 2.483000 0.000000,     3Droo=2.483000, 3Dcoo=0.000000 0.000000 0.000000,
    3Dlights=CAD,
]{\linewidth}{\linewidth}{Bob.u3d}
\end{document}

where Bob3d.u3d is a sample virtual reality file I had. This works (or did) for movies, and I expect it might work for gifs too.