Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d31a2058893d150…

MALICIOUS

PDF

38.3 KB Created: 2020-08-15 03:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ef4cbdfb86105a9bf0339ca1e3ddd99 SHA-1: 5044fac92f6a07b2eb03c97738d98b300a63a63c SHA-256: 3d31a2058893d15067bff740dd38f5384e558d593b7a8004cb55c4d3bb026e89
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=hipaa+guidelines+2018+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, but the malicious link is sufficient evidence of a phishing or redirection attack.

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=hipaa+guidelines+2018+pdf
    • http://files.polesworthpoetrytrail.org/uploads/1/3/0/7/130775001/8c937.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/wexuvafalupovev.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/toefl_practice_test_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/vmware_interview_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/wuzefapekekuxoputisuranir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/gold_gym_trainer_420.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/62450580774.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/wibutozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/55969634091.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73768917897.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5915/files/27773780578.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_off000058ef.bin
de3453d394e71c6a70f73ad20626f91691192c56635820939737b5cc1f0b3059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58EF 5592 bytes
font_01_sfnt_off00006bfd.bin
f1fb6876abffd506ed24e601ec9f786718c90dc59ef450ad8312eb618a6fb39e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFD 9688 bytes

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