/usr/share/tesseract-ocr/tessdata/configs/pdf is in libtesseract3 3.04.01-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | tessedit_create_txt 0
tessedit_create_pdf 1
tessedit_pageseg_mode 1
|