Here is what they say on their site:
"We are currently seeking an intern for our office in Miami (USA). Creative, passionate, energetic and aim to work in a collaborative environment. This position requires excellent sketching, rendering and communication skills. Candidates should be highly motivated, disruptive, out of the box thinking, as well as sensitive to Pininfarina’s design language and DNA.
Qualifications
Currently enrolled in an Industrial Design Program
Unique ideation, concept development and experimentation
Remarkable capabilities in sketching and renderings
Proficiency in 3D Software (Rhino) and rendering tools (V-ray, Keyshot and Adobe suite)
Passionate about design and how it strategically impacts on user’s experience
Fluent in English. Spanish and Italian is a plus
E-mail address for applications: careerspfa@pininfarinaextra.it"
So no specifications on PDF vs link that I can tell.