Malicious PDF — malware analysis report

Static analysis result for SHA-256 154d7334faa8f2c5…

MALICIOUS

PDF

48.7 KB Created: 2020-08-10 20:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 537fbee82a9abb7e7e3b7d3ea89c768e SHA-1: 7a232a6cf5b3c607bb9aa5eb50629231c01b1c39 SHA-256: 154d7334faa8f2c5c683050031393b6e4187b77b79bd7e71c9a75a735cbbd697
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains this URL, suggesting an attempt to direct users to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to obscure the malicious redirect.

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.com/pify?keyword=architectural+drawing+checklist+pdf
    • http://files.sharkbaitbeachcam.com/uploads/1/3/1/3/131379253/demewa_rajin_jakajojupup_feperuso.pdf
    • http://files.atlanticartgallery.com/uploads/1/3/0/8/130873932/sagugiwe.pdf
    • http://files.strictlybraids.com/uploads/1/3/1/3/131380120/falebewimati_zekagimun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/best_place_to_farm_thorium.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/5006/files/6074743113.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/cours_grammaire_francais_facile.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/78448779717.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/revozaperopevuragi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5649/4757/files/kikanebetuzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/bibevafemidom.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/rozitareranoluzude.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/cateterismo_venoso_central_y_periferico.pdf
    • https://cdn.shopify.com/s/files/1/0451/8169/8199/files/6283_audio_amplifier_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/fugarokuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/52968898977.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ff1.bin
d99c6384061d2ffb2cb48ee0f5780c6b4f08fc2be2ee16bc0acd50e6a0181694		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF1 5564 bytes
font_01_sfnt_off000092ef.bin
72f66b12a3af05f2ddd2662756cd8f63b4d358cf54619318fc892240867e02c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92EF 10292 bytes

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