Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db110a8a19f26ac…

MALICIOUS

PDF

69.4 KB Created: 2020-08-01 05:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd83b0c6c7dab5e465d25ca58df4157e SHA-1: c38fbe3a540fb1fff7a6c3667c32bd515f04808f SHA-256: 6db110a8a19f26ace353649339d64a5a6d7569eac2c163a9594a327f43294799
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=milwaukee+tv+guide'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the document body contains obfuscated text and a URL that likely leads to a secondary payload or phishing page.

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=milwaukee+tv+guide
    • http://files.getitwright.com/uploads/1/3/0/7/130776788/pufim-fafopunatobi.pdf
    • http://files.kumanokodoguides.com/uploads/1/3/0/7/130776003/releweba.pdf
    • http://files.sakuramassagesantafe.com/uploads/1/3/1/4/131408664/livipazarupa.pdf
    • http://files.undergroundcomedyfest.com/uploads/1/3/0/8/130814234/582a1a69.pdf
    • http://files.tinyhivedesign.com/uploads/1/3/1/4/131484328/taritabowuwit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/pewamiwovibavovebese.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/mevibuxadewotuworubokila.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/zekibakosib.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/zedexopotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2102/files/22744874496.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29331550606.pdf
    • https://cdn.shopify.com/s/files/1/0430/1144/0803/files/29452382948.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/13387201389.pdf
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/three_kingdoms_resurrection_of_the_dragon_2008.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab46.bin
7b40eb7d8f00b72dace7323e3c87b4fb7246ecc5b68200ee9517033d4643c183		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB46 4940 bytes
font_01_sfnt_off0000bc4e.bin
b44479c751a3dcfa4e511ee112a007bffccf255cf132a87ca27853ef564b3ddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC4E 16040 bytes
font_02_sfnt_off0000ee50.bin
391e1de9f6bc7eae81880dad6edf2d41c6a1fcc2a77ea44b97fe3bad395cc475		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 17200 bytes

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