Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f69ac5a6d13b16e…

MALICIOUS

PDF

32.9 KB Created: 2020-08-03 23:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ac53471548e33c3d1a77d57fcaecd3 SHA-1: 5036edb84ae37e531bf8d402a96273c853ff3f92 SHA-256: 4f69ac5a6d13b16ed68caab0ee78cb2cf06bf0726316822b8b822677a7ae061d
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. This link is presented within the document body, disguised as a sociology textbook PDF. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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=sociology+a+level+textbook+pdf+ocr
    • http://jemuzuli.mcleanmsband.com/uploads/1/3/1/8/131856161/pinoge.pdf
    • http://files.akws.org/uploads/1/3/1/3/131398367/wujagizixofipi-rakik-kenafanokuf.pdf
    • http://files.benandrews.com/uploads/1/3/2/7/132712334/65e4e310f0c.pdf
    • https://cdn.shopify.com/s/files/1/0434/5449/6935/files/malorowejelut.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/linked_list_destructor.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/wusixapegapajowedopejave.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/nemezixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/83022505015.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/88068891404.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/schroeder_thermal_physics_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/toyota_4runner_manual_transmission_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/37354494900.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/18766914281.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3625/files/lobebekixewusuvuk.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_off0000423a.bin
b6d9699733b7776db088466425597b24f4ed36a57d75527b8b998667ccf91265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x423A 5680 bytes
font_01_sfnt_off000055ba.bin
22b0bcc5d86cc465dc20f6000db233febea4c8b8cf872bccb1e2f3f115fce2b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55BA 9776 bytes

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