Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdc8809fb23e748…

MALICIOUS

PDF

47.4 KB Created: 2020-08-26 17:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8a12294f6e2d274df7767fba950fa1f SHA-1: d22a1e6f0a9007e348dad10b2729bd5f8a6fd0c2 SHA-256: 0fdc8809fb23e74894486af9bab03c16c44cf1f716051a7083429887751de650
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a lure for 'autocad 2006 crack'. The document body also contains this URL and other PDF links, indicating a link farm strategy. The ML classifier strongly supports the malicious verdict, suggesting the primary goal is to redirect users to potentially harmful 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.link/pify?keyword=autocad+2006+crack
    • http://files.ardsleylatin.org/uploads/1/3/1/3/131381095/nesuwuwumez.pdf
    • http://files.courvoisiercentre.com/uploads/1/3/1/4/131453278/rosefizexedewe-lirama-garojetejoz.pdf
    • http://files.tonyreeckmanphotography.com/uploads/1/3/2/7/132741155/pijisopad_dezezulozuvidog_gifid_kezovipu.pdf
    • http://files.ninelivestwine.com/uploads/1/3/2/6/132682787/gokotawazan-gatunogiregenam-xaruwuverotup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/90550847673.pdf
    • https://cdn.shopify.com/s/files/1/0454/3060/3932/files/kevegamupegurujuxedu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/3208601198.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/linirevazewixokizedun.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/kirchhoff_s_theory_law.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/48957423043.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/inventory_report_sample_letter.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/32511265233.pdf
    • https://cdn.shopify.com/s/files/1/0430/0881/9349/files/56923303280.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/gynaecology_mcqs_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8697/1033/files/l_amant_marguerite_duras_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0467/9702/9525/files/6812975458.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a9.bin
f4c4f221fc9e3f8ee9834962b5263f3c795d2011e2d338f28585e59c3036d363		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A9 4816 bytes
font_01_sfnt_off00007a0b.bin
f40c0b62412f18e0be0b0d84c8fbb01963151001a633104e5d5bde7af14c8ea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0B 12516 bytes
font_02_sfnt_off0000a2db.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DB 4324 bytes

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