Adobe Reader is a Office Tools software developed by Adobe Systems. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Adobe Reader:

MarydownEditor: Adobe® Reader® software is the free global standard for reliably viewing, printing, and commenting on PDF documents. It's the only PDF File Viewer that can open and interact with all types of PDF content, including forms and Multimedia.

Top features

Access to all PDF files
View and interact with PDF files that contain a wide variety of content, including drawings, email messages, spreadsheets, videos, and other multimedia elements. Access PDF files on the go from your mobile device.

Enhanced commenting tools
Make notes and share your feedback with others by marking up PDF documents using the Sticky Notes and Highlighter tools.

Industry-leading security
Take advantage of the security of Protected Mode in Reader, which helps safeguard your computer software and data from malicious code.

Online services
Directly access online services at Acrobat.com from within Reader X. Perform common tasks such as creating PDF files, securely sharing and storing documents, and screen-sharing.

Simplified user interface
View information more precisely and efficiently. Choose reading mode to fit more content on the screen or two-up mode to view PaGE spreads. Use Keyboard Shortcuts like print, zoom, and find within the browser.

Comprehensive file searching
Find and retrieve any PDF document or phrase within a document in seconds. Search for words in page content, annotations, bookmarks, form fields, or document metadata within any PDF file on a local computer.

Opening PDF Portfolios
Open and view contents of a PDF Portfolio, a collection of PDF documents, and other document types, including drawings, email messages, spreadsheets, and videos.

nternational standards
Take advantage of support for the new ISO Standard 32000 for PDF. Also, Reader continues to support PDF/A, the ISO-approved standard for the long-term preservation of electronic documents; PDF/X (printing); PDF/H; PDF/E (engineering); XMP/RDF; and ODBC.