Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee939f326649e73…

MALICIOUS

PDF

46.8 KB Created: 2020-10-29 10:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ecbd9f049576c723a880faa2b3f64ef SHA-1: d6ee95b019b46246e5ebfc1c293e80370e94bf00 SHA-256: bee939f326649e7352e68ea92f81997d803fbebdc890274ca386121ae78cbd34
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/123?keyword=what+is+your+philosophy+concerning+discipline'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://s3.amazonaws.com/zirojopemup/adeept_ultimate_starter_learning_kit_for_arduino.pdf'. The ML classifier also strongly flagged this PDF as malicious.

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.me/123?keyword=what+is+your+philosophy+concerning+discipline
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f87cc859faf6.pdf
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/53295.pdf
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f8df9de2b717.pdf
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f86f864a610b.pdf
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5f9744b5a6046.pdf
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f8879ae8ccbd.pdf
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5f9037cad433d.pdf
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f8dcc074f840.pdf
    • https://cdn-cms.f-static.net/uploads/4405651/normal_5f9896440fbb4.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdf
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f9659d051c5d.pdf
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/tanixoson.pdf
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f8ca30870a96.pdf
    • https://kawewadibuporak.weebly.com/uploads/1/3/4/3/134371142/vivewinifulinen.pdf
    • https://cdn-cms.f-static.net/uploads/4417528/normal_5f96d029b7347.pdf
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f8c62a1863ca.pdf
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5f9754175cada.pdf
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5f9156b08b577.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zirojopemup/adeept_ultimate_starter_learning_kit_for_arduino.pdf
    • https://s3.amazonaws.com/subud/estadistica_descriptiva_probabilidad_e_inferencia.pdf
    • https://s3.amazonaws.com/sinadi/aseity_of_god_sermon.pdf
    • https://s3.amazonaws.com/kavitokolezub/gofasomasetunixidi.pdf
    • https://s3.amazonaws.com/loneminovu/vavipexofekade.pdf
    • https://s3.amazonaws.com/xanebavifamopez/wuvem.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_off000077fc.bin
2ef7aba9da283c6d1c31498685fdcea4ddbe36092ed5b82f3cf0a24ecd2976a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FC 5452 bytes
font_01_sfnt_off00008a90.bin
4a76780962408488577a95c23cc9031f10b3971349438c320b8a11d022769293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A90 10184 bytes

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