\documentclass[11pt,letterpaper,notitlepage,twoside,openright]{report}

%%% Pdfpages %%%
\usepackage{pdfpages}


\begin{document}

Before document

\includepdf[pages={-},nup=1x1,frame=true]{dummy.pdf}

%\includepdf[pages={-},frame=true]{.pdf}
%\includepdf[pages={-},frame=true]{.pdf}
%\includepdf[pages={-},frame=true]{.pdf}
%\includepdf[pages={-},frame=true]{.pdf}

After document.

\chapter{This is second stuff}

\end{document}