PDF Pen has a script to reverse pages:

-- This script reverses the page order.

tell application "PDFpenPro 6"
	if (count documents) > 0 then
		tell document 1
			set pageCount to count pages
			if pageCount > 1 then
				set halfCount to pageCount div 2
				repeat with pageNumber from 1 to halfCount
					move page pageNumber to after page (pageCount - pageNumber + 1)
					move page (pageCount - pageNumber) to before page pageNumber
				end repeat
			end if
		end tell
	end if
end tell


On 4 Apr 2014, at 03:55, Nobumi Iyanaga <[log in to unmask]> wrote:

> Hello,
> 
> I have many pdf files for which I would like to change the pagination -- for example reverse it completely, from the last page up to the first page, or invert (put page 1 as page 2, and page 2 to as page 1; page 4 as page 3, and page 3 as page 4, and so on).
> 
> I would like to ask if there is any tool that can automate such tasks, and how it is possible.
> 
> Thank you very much in advance.
> 
> Best regard,
> 
> Nobumi Iyanaga
> Tokyo,
> Japan