Malicious PDF — malware analysis report

Static analysis result for SHA-256 558246470457d645…

MALICIOUS

PDF

40.2 KB Created: 2020-08-27 21:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01ab64e44b503c704379fdc6c2485df SHA-1: 6d7336a6d55859d3a955777ff1b1f9f755ba8c4e SHA-256: 558246470457d6453f3c607cd07d550d84416f8c0f2e069b834c4cff521498fc
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 'https://ttraff.com/pify?keyword=escalation+protocol+boss+this+week'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to Shopify-hosted PDFs, suggesting an attempt to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and references to 'escalation protocol', reinforcing the lure.

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=escalation+protocol+boss+this+week
    • http://files.saikmusic.org/uploads/1/3/2/7/132740415/67c8893d65fe7.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/kenmore_quiet_guard_3.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/zygoma_implants.pdf
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/kuxadenaviwimad.pdf
    • https://cdn.shopify.com/s/files/1/0447/3955/9573/files/nervio_glosofaringeo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1059/files/verbs_adjectives_nouns_with_prepositions_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9109/files/nenuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/nojaputugogusalogoxoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/rekulipafumapolodaripabik.pdf
    • https://cdn.shopify.com/s/files/1/0429/6087/9782/files/shear_force_and_bending_moment_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/11835772251.pdf
    • https://cdn.shopify.com/s/files/1/0450/3722/4094/files/80002372355.pdf
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/butterfly_life_cycle_video_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000607b.bin
bf4341450c3391b14577fdd089d0a1ce63a73ebec99ac0fd8dc9c5b875e0b4f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 5276 bytes
font_01_sfnt_off0000726b.bin
e8633cd7d069f0a23c1f74141f6fa21ee509a0c9055af294870932ea5e33ec6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726B 9844 bytes

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