To reproduce: 
 1. Download the Telerik_UI_For_WinForms_2014_3_14_1202_Dev_NuGet.zip and extract on computer
 2. Create a project which contains RadPdfViewer and RadPdfViewerNavigator
 3. Install all nuget packages
 4. You will see that the Telerik.WinControls.PdfViewer.dll is not installed because is not included in the package.

Workaround: 
Download the zip file with Dlls and themes only (Telerik_UI_For_WinForms_2014_3_14_1202_Dev_hotfix.zip) from your account.

Resolution: 

The new nugget package is added in our suite. Its name is UI.for.WinForms.PdfViewer.[Version].nupkg.