Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f51c9b5fc6e8014…

MALICIOUS

PDF

59.9 KB Created: 2020-08-02 09:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04e254ccb411e8fd9b97c20e0361eabd SHA-1: ee30210bc263f667e074e77635e80490464be490 SHA-256: 0f51c9b5fc6e80146e35d9d5100e7ebf699a1d9eaad9baf0e36bf53e9ab919c1
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=athens+ohio+tv+guide', suggesting a lure to a malicious site. The presence of many PDF links indicates a link farm, often used for SEO poisoning or distributing malicious 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.com/pify?keyword=athens+ohio+tv+guide
    • http://files.cravecavelv.com/uploads/1/3/0/8/130874201/2500107.pdf
    • http://files.delisodidit.com/uploads/1/3/2/3/132303061/vujosuxopibik-karimuzosososis.pdf
    • http://files.paintrollersplus.net/uploads/1/3/0/8/130874477/b10b3d2ab.pdf
    • http://files.gloucestershiregatewaytrust.org.uk/uploads/1/3/1/0/131070207/temalabal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7994/8705/files/kexodubuxek.pdf
    • https://cdn.shopify.com/s/files/1/0436/7450/1273/files/tiwigedijufasuwabunokexum.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/xunademekuvomadaratef.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/fosapejalojanam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/duromisenuwudaxutemaseg.pdf
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/20231418925.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/61729184650.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/hallelujah_jeff_buckley_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/52835990820.pdf
    • https://cdn.shopify.com/s/files/1/0439/4126/5566/files/pegidodopatativotinuzawuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/fopudajenenaxowuvebuze.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/55984980977.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_off0000aae3.bin
429ad87c372314cb45b14e58930982a15afa5268d971e25db969383ed53259b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE3 4796 bytes
font_01_sfnt_off0000bb3f.bin
ff86d748703bd395ca1af30e67c097825a3bfd180e039e15c7adae6b1d9bf6c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3F 11496 bytes

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