Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc106c1da72c1d8…

MALICIOUS

PDF

44.3 KB Created: 2020-07-31 10:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bb995268c6824e56d24af979487dd55 SHA-1: 75e01b770ce1850e9759521119335dc88d3af898 SHA-256: 7fc106c1da72c1d89a4cf8359b12b45e451f9de403849136b932127e276d9e51
154 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to redirect users to external websites, a technique often used for SEO link farming and distributing malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=graphic+designer+experience+certificate+pdf', is flagged as a malicious redirector. The document's content, though heavily obfuscated, appears to be a lure related to a graphic designer certificate, aiming to trick users into clicking the malicious links.

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=graphic+designer+experience+certificate+pdf
    • http://files.rayzinktattoo.com.au/uploads/1/3/1/4/131453177/korugiviwujepaseb.pdf
    • http://files.rcmhistory9.com/uploads/1/3/1/3/131398432/gudebamim.pdf
    • http://files.adventuresaroundscotland.com/uploads/1/3/1/4/131453395/wiladatu-poxuker-pefuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6916/1126/files/29155823611.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/wikuzolatokobojopok.pdf
    • https://cdn.shopify.com/s/files/1/0427/7665/8087/files/35231785955.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/30678911157.pdf
    • https://cdn.shopify.com/s/files/1/0428/7702/6463/files/jukekuritajiwigogagaboz.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/22775065076.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/90814338631.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/63488890895.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7133/files/dipazutuxadokijekupixilub.pdf
    • https://cdn.shopify.com/s/files/1/0439/0915/2936/files/23887034074.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1329/files/1760854539.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/gadakotevufebixujisutosa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/levitolalawasan.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_off00007083.bin
366a672294e071f42cb5853281c116bbab99c4644b80900b8d23b6c802534de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7083 5160 bytes
font_01_sfnt_off0000820b.bin
dffe21147f808f8669d49ac3cf442da0be9be815e2b3181d4b64a28216c8bb6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x820B 9908 bytes

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