Malicious PDF — malware analysis report

Static analysis result for SHA-256 7326b9e5118d9a8a…

MALICIOUS

PDF

49.5 KB Created: 2020-07-29 13:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6329ffaf48140341de920b5ecf5fe295 SHA-1: b925634d8bc906c4c84f1778fd7ceec8ec70a23d SHA-256: 7326b9e5118d9a8a3a9e82dd5d9cad252324d73585c848d97f73aadee418b91d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link farm pointing to redirector infrastructure. One of the primary URLs, 'https://ttraff.ru/pify?keyword=simple+case+study+sample+pdf', is flagged as malicious. While many other Shopify links are benign, the presence of the malicious redirector suggests an attempt to lure users to potentially harmful content. No scripts were extracted, and the document body is largely unreadable binary data, making the attack pattern primarily based on the URL analysis.

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.ru/pify?keyword=simple+case+study+sample+pdf
    • http://files.brunoforcine.com/uploads/1/3/1/3/131398452/dedusawoxukilela.pdf
    • http://files.knockouthumor.com/uploads/1/3/1/0/131070246/71c8d42.pdf
    • http://files.artisanbuiltins.com/uploads/1/3/1/6/131606345/lalazafonovukadej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7471/4784/files/jajokuxexokuvefuzufani.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/59845312070.pdf
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/labosigadu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/nifudexitotaligixemosiruw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/93224968186.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/22229801075.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/73830705774.pdf
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/tovasojopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/mepefavoxupuwudowu.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_off0000781e.bin
fc2f8e66a7399186f16741a8ac4a3752660aac259fe1ed7eedf15bd307fcffe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781E 5076 bytes
font_01_sfnt_off00008968.bin
00612b7fee9715dfdc24f2ec3809c5be3f81fc3a3b02025ce04482f8f2db80b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8968 15200 bytes

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