Try this:
$oPDF = ObjCreate("AcroPDF.PDF.1")
ConsoleWrite('AcroPDF object creation: ' & (IsObj($oPDF) = True) & @CRLF)
$oPDF.src = <path to your pdf>
$oPDF.setShowToolbar(0)
$oPDF.setShowScrollbars(0)
$oPDF.setView('Fit')
$oPDF.setLayoutMode('SinglePage')
$oPDF.setPageMode('None')
$hMain = GUICreate('Test', 1280, 720)
GUICtrlCreateObj($oPDF, 0, 0, 1280, 720)
GUISetState(@SW_SHOW, $hMain)
Do
Until GUIGetMsg() = -3