Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e4537eba8fb45d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-02 12:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbb7a0631f70306b5eac52b9fbe6326c SHA-1: 46f8c8e6a9e2c81833d01c921a8fa08b8be5a7da SHA-256: 50e4537eba8fb45d4cd7242b860d6057a0a0d442ebb712db1a80ca43d1805d78
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a known malicious redirector, disguised as a Range Rover owner's manual. The document body and embedded URLs indicate a lure to a malicious site. The PDF_SEO_LINK_FARM heuristic suggests this PDF is part of a larger infrastructure to generate traffic to various PDF documents, likely for SEO poisoning or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://ttraff.cc/pify?keyword=range+rover+sport+owners+manual+pdf
    • http://files.powerofbankinginyourhands.com/uploads/1/3/1/4/131406663/gixokufowole.pdf
    • http://files.avocadotoastfinance.com/uploads/1/3/1/4/131409090/d135510eb.pdf
    • http://files.mrmark.co.uk/uploads/1/3/1/8/131856706/fufal.pdf
    • https://cdn.shopify.com/s/files/1/0429/3450/1535/files/vafixarunivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685258811.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/gozeduj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/gokugag.pdf
    • https://cdn.shopify.com/s/files/1/0433/4678/8502/files/tekotedigunuvedituk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/navy_seals_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/61511002624.pdf
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/10756318073.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/56023938509.pdf
    • https://cdn.shopify.com/s/files/1/0440/3855/3765/files/retefafunu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/pexebaveselivezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/string_compression_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/jakunot.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d36.bin
9e64fe85e06406b03b17dde0b18807c61b48ef5bfd208bf41f4c0104c50f933e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D36 5352 bytes
font_01_sfnt_off00006f6d.bin
ede176f60cc0cf276b0e8972da55d21c86e416dd53214b6d349ca8fc1fcd0f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6D 12452 bytes
font_02_sfnt_off00009747.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9747 4324 bytes

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