Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f66fc647b5f2308…

MALICIOUS

PDF

41.0 KB Created: 2020-11-02 08:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ada4c3b16c79e393ec1f27dc0ee4643 SHA-1: 78f9b9d5ad2c115e314da70e0a44edeca5f41a3c SHA-256: 7f66fc647b5f23084fb6265fe41d1129d4d935d40357350de3e9e2600c98675e
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ggtraff.ru/123?keyword=words+starting+with+pig'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

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://ggtraff.ru/123?keyword=words+starting+with+pig
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f9e7d5d1fe00.pdf
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/duxulilu.pdf
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/5718860.pdf
    • https://xufizigox.weebly.com/uploads/1/3/4/4/134479456/8520551.pdf
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5f8b2b142c8e1.pdf
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f8f80512933a.pdf
    • https://cdn-cms.f-static.net/uploads/4408991/normal_5f9394b64b0d1.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/4614945.pdf
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f876baf1998e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7e63d86b-1b18-4ae2-9447-389c10182314/mogowizunovazubosowibeses.pdf
    • https://s3.amazonaws.com/zidenigad/47385551887.pdf
    • https://s3.amazonaws.com/bejeseja/circles_quiz_answers.pdf
    • https://s3.amazonaws.com/pugomonapoxuxe/pathophysiology_ebook.pdf
    • https://s3.amazonaws.com/gadumagabusodel/quran_bangla_translation_download.pdf
    • https://s3.amazonaws.com/tadovu/kexefikipeziwokidejevir.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_off00004d4c.bin
1688ee2629fb5c8827daa73a79c55176ced6a3bad8c566fb90fabb72369f14ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D4C 5296 bytes
font_01_sfnt_off00005f63.bin
73c6d7c41fea8b9882f46666650439b90a4efc3d87871e506d66fddd69671d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F63 10116 bytes
font_02_sfnt_off00008244.bin
5daa2859ac1cba10c019d93b3654b7392607614b218f12f6681e5ae5f126ae4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8244 16072 bytes

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