trailer regex failed

[Ishmeet]

ishmeets@ishmeets-mbp pdft % go run main.go 
trailer not found
panic: Couldn't open pdf.

goroutine 1 [running]:
main.main()
	/Users/ishmeets/workspace/pdf/pdft/main.go:15 +0x1dc
exit status 2

PDF:
Get_Started_With_Smallpdf.pdf