Malicious PDF — malware analysis report

Static analysis result for SHA-256 9037b8df7f32b120…

MALICIOUS

PDF

34.3 KB Created: 2020-08-22 20:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34dd8066ba51b962884a04d8b73138d SHA-1: 3dbe2414ec9ba50983ecfa6c9dfd494cbc06b56a SHA-256: 9037b8df7f32b1202cffaeb03d60dd5eaac5e3c8a29a7ac244bc1e7104ae1114
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to external PDF files hosted on various domains, including a primary malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies the URL https://ttraff.ru/pify?keyword=wordly+wise+book+12+lesson+5+answers as malicious. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic to lure victims. No scripts were extracted from this sample.

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.ru/pify?keyword=wordly+wise+book+12+lesson+5+answers
    • http://files.newnanfootball.com/uploads/1/3/1/8/131871850/2444695.pdf
    • http://files.kineticorllc.com/uploads/1/3/1/3/131379700/6038878.pdf
    • http://files.laurenballarteducation.org/uploads/1/3/1/8/131856170/nupizob_dulizowu.pdf
    • http://files.ellisbirdfarm.ca/uploads/1/3/1/3/131398143/8632484.pdf
    • http://nafixidu.nolaclay.org/uploads/1/3/0/7/130738909/rawojibo-rezixulofo-gipufegivave.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/fanizelunumufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90209356055.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/vulemunozabawiwidi.pdf
    • https://cdn.shopify.com/s/files/1/0453/8466/3208/files/i_swear_song_mr_jatt.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/dajobud.pdf
    • https://cdn.shopify.com/s/files/1/0448/2121/7442/files/alter_ego_3_guide_pedagogique_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/apostles_creed_in_latin.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_off0000470b.bin
f727c3dc5548c39599ee2832b0ef7b5c229ab15a667b15d2db01409f3ffbda9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x470B 5540 bytes
font_01_sfnt_off00005a1b.bin
8510be6b6f6db2eafc83f0bc94e4d7f26e4d002fc1dd908cce40c3dd40276320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1B 10168 bytes

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