Print vector image not pixel based to PDF using Microsoft Print To PDF printer

Question

I am trying to print a vector image (emf file) as a PDF using the default implemented Microsoft Print To PDF printer. Right now I just create the PrintDocument, change it's PrinterSettings to the chosen printer Microsoft Print To PDF and change other PrintDocument's properties.

PrintDocument pd = new PrintDocument();
pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);

pd.PrinterSettings = /*some custom printerSettings*/;

Now I basically just draw a scaled image of the emf file on a Bitmap which I draw afterwards on pd.

private void pd_PrintPage(object sender, PrintPageEventArgs e)
{
    Bitmap printDrawing = Draw.PrintVersion(); //custom method that handles the scaled drawing

    e.Graphics.DrawImage(printDrawing, new Point(0, 0));
}

In return I get a PDF file, but the issue is that the drawing on the PDf file is pixel based since I draw just a Bitmap on pd.

So the question is how can I solve this issue, so that the result is a PDF file which scales the vector image accordingly? So I have to skip the drawing, so I thought about just setting a filePath of the EMF file as an input for the PrintDocument, but neither Programmatically provide a filepath nor How to programmatically print to PDF , helps me in any way, since they all focus just on drawing the content which will result again in a pixel based PrintDocument.

So how can I set just a file/filePath as an input to the PrintDocument to keep the vector information?