Malicious PDF — malware analysis report

Static analysis result for SHA-256 e806224917184c2c…

MALICIOUS

PDF

38.8 KB Authoring application: Nitro PDF
MD5: d18d1c086f97d08f5d1c0017420e067a SHA-1: fc55f0d8c2a3633b9184546f64909496e13a0f54 SHA-256: e806224917184c2c671641ddd55805bc71ddca354819678536211b89d7e5c6d5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566 Phishing T1204 Malicious Link

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links likely serve as a link farm to redirect users to malicious sites, as indicated by the ClamAV detection of Pdf.Phishing.TtraffRobotInstall-7605656-0. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://giw.autogost.com/uploads/2020/01/27/8025579.pdf
    • http://visitcowan.org/uploads/1/3/0/6/130639045/7b3975770325.pdf
    • http://littlehouseonthegrid.net/uploads/1/3/0/4/130477468/3655554.pdf
    • http://reneegdesigns.com/uploads/1/3/0/5/130588282/844858bc6b8f31.pdf
    • http://shoppremierhair.com/uploads/1/3/0/5/130544230/bukuzap.pdf
    • http://xagolitene.equmedsdnbhd.com/uploads/2020/01/29/3084961.pdf
    • http://bellagaffney.weebly.com/uploads/1/3/0/5/130551375/c601c4d5dad1.pdf
    • http://aesco.com/uploads/1/3/0/4/130488396/7720379.pdf
    • http://lexanimi.com/uploads/1/3/0/6/130604465/1e3598e610c.pdf
    • http://sweetestdreams.org/uploads/1/3/0/4/130483393/130483393.html#chromatic+trumpet+sheet+music

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ea.bin
b795566a3b5d1202dba416fd84c8d0b93539032eb88dcbb18bc3abde284e67c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA 9472 bytes

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