Duplicate each pages thru JXS + Acrobat Pro

dupe-pages.js

var app = Application("Adobe Acrobat Pro")
	doc = app.documents[0];
app.includeStandardAdditions = true;

app.pdfWindows[0].pages().reverse().forEach(function(page){
	var n = page.pageNumber();
	doc.insertPages({after: n,
					 from: doc,
					 startingWith: n,
					 numberOfPages: 1});
});