Workaround
You can convert your PDF file, splitting it in a convenient way.
An easy tool can be mutool
mutool poster -x 2 -y 2 input.pdf output.pdf
Note: It is released with the Affero GPL licence, one of the GNU licences, so open source, you can read on wiki too...)
Under Linux mutool is installed with the mupdf package.
You can download the source code or the compiled one for the other OS (windows, android, apple...).
In Ubuntu you can install it directly with
sudo apt-get install mupdf-tools`
Last but not least, if you have no intention to install any program, you can use one of the many sites that allow you to do it online. As more hard alternative there are some python scripts based on PyPDF library available online...