Malicious PDF — malware analysis report

Static analysis result for SHA-256 6576a8b131402319…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 14:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2f780f9017baa7a493bcd43ec3bf8a9 SHA-1: d2633d42cc144f286772d67bb117ce24ceda0748 SHA-256: 6576a8b13140231932c59143c7d42d715762c6dc4b9f588f558d41613918f4d2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a link farm or SEO poisoning attack. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=biodiversity+loss+and+its+conservation+pdf, which is flagged as malicious. The presence of many external PDF links indicates an attempt to drive traffic to potentially malicious or deceptive 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.ru/pify?keyword=biodiversity+loss+and+its+conservation+pdf
    • http://files.dsmfunko.com/uploads/1/3/2/6/132696104/gitelubofexisivuvox.pdf
    • http://wudoj.iprookie.com/uploads/1/3/2/6/132682646/26210.pdf
    • http://files.blakestampergolf.com/uploads/1/3/2/7/132710797/zujazufexem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/sebakez.pdf
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/97258154240.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1056/files/73197423179.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/25026897949.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/heros_com_back.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/68313711712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/13854933553.pdf
    • https://cdn.shopify.com/s/files/1/0440/7666/2934/files/rewimanipu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/john_deere_790_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/ginixebogagewexazix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/sogilar.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_off00005dbb.bin
fb2cee4b36f764e15ee0ab4f66edd6f932252a6b2656030fef01d7df2bee420a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBB 5148 bytes
font_01_sfnt_off00006f59.bin
4d6332e060d43c5e2a72169c915d4fe3ec266ab121daadca57b89551a645d08d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 10232 bytes
font_02_sfnt_off00009261.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9261 4324 bytes

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