Orientation changing when splitting a particular PDF document with clipped output

When I am splitting a PDF(with landscape orientation) that is extracted from crystal report, resulting files are converted in Portrait orientation with partial part getting removed. We are using getDocumentCatalog().getPages() to get particular page and saving it.

The same file when opened in Internet Explorer and selected to print, detects orientation correctly. It is working when using 

Please share if there is any specific reason for such behavior and the way to handle it in coding.