Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2e3d1ec13f5cd1…

MALICIOUS

PDF

72.4 KB Created: 2020-08-25 06:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 701891952dbf193409c1ddfd9bb71eed SHA-1: 5382cd1401e2c86544c6c064cc9c3d5817847762 SHA-256: 0f2e3d1ec13f5cd19d8a4908b5f1021d270cfa8f16df1ae17e8fbd0cd162bd7d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to a malicious redirector, which is also present in the document body. The file also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The primary malicious URL identified is https://ttraff.ru/pify?keyword=afrocentrism+definition+pdf, which is likely used to distribute further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=afrocentrism+definition+pdf
    • http://files.twistedoakandco.com/uploads/1/3/1/6/131637190/gebafixorobumab-kufuw-wekakik.pdf
    • http://xolidikol.tracygrammer.com/uploads/1/3/1/4/131453960/2566f6969680.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/28083538067.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/camilla_lackberg_knjige.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/behavior_modification_therapy_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/81547803910.pdf
    • https://cdn.shopify.com/s/files/1/0430/4050/6009/files/pobixuwowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11411440246.pdf
    • https://cdn.shopify.com/s/files/1/0463/8883/8555/files/classification_of_matter_quiz_answers.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_off0000e0ea.bin
6f3d3b898c41bc1fbce9cb6667be51a8bbb4a87f3d7e3db156c133bafcff7fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 5048 bytes
font_01_sfnt_off0000f1fe.bin
09a2a7b5fc42ce8989f1f58fcbe40c88c28e4d9f7df436705093bdf97587c392		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 10176 bytes

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