Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c59ba120d2adb5d…

MALICIOUS

PDF

43.4 KB Created: 2020-09-20 09:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 020989784242a95f69e20e658111b456 SHA-1: 18e3b8263a505ce50d38d709b23652f9bf06f9da SHA-256: 7c59ba120d2adb5d4c47c7f5a1312130d9e9b10c4aa8c638a29b739857a45c63
184 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a link farm, a common tactic for SEO manipulation and distributing malicious content. The primary link, 'https://ttraff.ru/wix?keyword=kitchenaid+dishwasher+control+lock+blinking', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, indicating its central role in the attack. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=kitchenaid+dishwasher+control+lock+blinking
    • http://webibaj.garthdee.info/uploads/1/3/1/8/131856435/6711254.pdf
    • http://files.knowyourbusinessplans.com/uploads/1/3/1/8/131858592/8523756.pdf
    • http://files.simpsoncsm.org/uploads/1/3/2/7/132710795/36ccb.pdf
    • http://laxufuvon.bridgendgranite.com/uploads/1/3/2/7/132740763/ladutujizaguvevuga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://068932e7-3b9f-4c56-a102-dfc346a4dc5b.filesusr.com/ugd/5aec95_f6728c1365794de9ac33843c614a13a4.pdf?index=true
    • https://864bc25c-1253-450d-8a5d-de44d5f64785.filesusr.com/ugd/2b3f46_21a9e95b81d44ceeb9dc975f075fdbcf.pdf?index=true
    • https://9da5f437-3634-4a06-8f08-49af85cc13e2.filesusr.com/ugd/4ca7f5_69c0abd839ba455ab0d75dcf92959527.pdf?index=true
    • https://62a18686-062c-400e-88eb-3d39f0da5e00.filesusr.com/ugd/957eb4_abb0b16b9ca449e49449c8fdf23a3685.pdf?index=true
    • https://4af68585-a40b-4b7d-952e-0a49eddea334.filesusr.com/ugd/c12414_703a547d72f242e387db4f81a7e679e0.pdf?index=true
    • https://7629c549-d9f7-46fe-bf9d-016c5553cb21.filesusr.com/ugd/1e533a_9acb251b8e004a578e015405586a8e0a.pdf?index=true
    • https://00bff19d-3eea-4fcc-b7b7-509359871107.filesusr.com/ugd/f9d4cd_cfab55ee9dce4f7795c76297013bbc85.pdf?index=true
    • https://42651068-2981-4a7e-9344-060b98e491fc.filesusr.com/ugd/33a16d_77b47e6d819a4ea6a327e1606f98e113.pdf?index=true
    • https://1306726f-dd0f-4d44-9146-646fab62ef96.filesusr.com/ugd/19ce5d_dff2d7f93d4143c1b0a1ac9716f88587.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/tapebuwotere.pdf
    • https://cdn.shopify.com/s/files/1/0432/2076/2783/files/saint_seiya_lost_canvas_dublado.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_off00006b49.bin
a48ff151c60a3177920f155f70cb4738aaed3f7fb41e20bdb302c4ac94840899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B49 5464 bytes
font_01_sfnt_off00007dea.bin
f772ac8376bf0c474ae413eb46e6b31efebffb8a2899fa87c13b7ca3debe06f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEA 10128 bytes

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