Malicious PDF — malware analysis report

Static analysis result for SHA-256 808421258d1292d1…

MALICIOUS

PDF

46.4 KB Created: 2020-08-27 18:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e87a6b061069faa878b3cc9f9a3d92a SHA-1: d5e99d1e0eafc61b7b4ff95c17c42076ea6efd67 SHA-256: 808421258d1292d15d0b5809d8e1bc13c293eaabdc2950aee829d2ffe7e0c05e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and references 'Volkswagen workshop manuals golf mk7', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=volkswagen+workshop+manuals+golf+mk7
    • http://files.djbendigo.com/uploads/1/3/1/4/131437306/japudaxadu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/noxerezokadinanip.pdf
    • https://cdn.shopify.com/s/files/1/0437/8220/9698/files/automatic_control_systems_9th_edition_solution.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/gexiposizebozip.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/51385457845.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/14791542265.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1278/files/xivuferopotanutosapetuxuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/wedding_march_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/fifexumapu.pdf
    • https://cdn.shopify.com/s/files/1/0448/4923/4081/files/pusizaxovorajowozip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/java_graphics_programming_books.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/
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/14791

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f3e.bin
56c6fd5b2ee787663b0daeeed44968441437a6f367a4825e1d21310aef643597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3E 5516 bytes
font_01_sfnt_off000081f2.bin
a40a8e91a62fec4a8a73d9807b2b368068408c77d2273551b9c484fb825b2b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F2 13804 bytes

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