Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9d60fcd7916a5f…

MALICIOUS

PDF

66.7 KB Created: 2020-08-24 20:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d237082e784207f70c6d7b193597ba3 SHA-1: c889e7297aa2e881ee4c8e3d64c825fa2fd18b9b SHA-256: 0b9d60fcd7916a5f44fc8aa00c7dc7256c8aaa6800683d303d4665039e4559b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm infrastructure designed to redirect users to potentially malicious sites. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify-hosted PDFs, suggesting a tactic to appear legitimate while distributing malicious links.

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.ru/pify?keyword=valvular+heart+disease+and+anesthesia+pdf
    • http://files.dustinmarquel.com/uploads/1/3/0/7/130776499/8c361e3.pdf
    • http://files.thenewschoolpreschool.com/uploads/1/3/0/7/130739015/paxeninuv_fepigadavibobor_pibone_tegeworoxelina.pdf
    • http://files.sunburstchefandfarmer.com/uploads/1/3/0/8/130814430/3300399.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0919/files/pamereneluz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/nofitelaxilosowarixexenux.pdf
    • https://cdn.shopify.com/s/files/1/0450/8824/3864/files/nsfas_application_form_2020_ukzn.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90379225571.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/nirosaza.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3478/files/cdia_mortgage_reporting_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/automatic_star_delta_starter_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/how_to_use_a_pendulum_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/carrier_psychrometric_chart_si_units.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/74446349278.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/diwasirozogegifisuk.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b17c.bin
846fa1cdb8362931a481dec2e6c50c827f77b3ff1ebae7e0a505969345466875		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB17C 2080 bytes
font_01_sfnt_off0000bb0f.bin
01e17561acad3ca5f1cba17b9b49e022f35061b3cfd0fc5d7e95a2a77a8a582d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0F 4924 bytes
font_02_sfnt_off0000cbc1.bin
3777e4be84f14f8716cedd51574795776cf3769227509c8d92d9052254581be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC1 10420 bytes
font_03_sfnt_off0000ef37.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF37 4324 bytes

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