They're probably just test pages. After looking at the raw PDF data I found this signature:
Code:
/URI (http://www.tcpdf.org)>> /H /I>>
endobj
24 0 obj
<< /Title (þÿ F I R S T R o b o t i c s C o m p e t i t i o n) /Author (þÿ F I R S T) /Subject (þÿ F I R S T R o b o t i c s C o m p e t i t i o n) /Keywords (þÿ T C P D F , P D F , e x a m p l e , t e s t , g u i d e T C P D F) /Creator (þÿ F I R S T R o b o t i c C o m p e t i t i o n) /Producer (þÿ T C P D F 5 . 9 . 1 2 8 \( h t t p : / / w w w . t c p d f . o r g \)) /CreationDate (D:20121227223309-05'00') /ModDate (D:20121227223309-05'00')
"TCPDF is a FLOSS PHP class for generating PDF documents."