Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36bed3707f330e2…

MALICIOUS

PDF

56.6 KB Created: 2020-10-28 11:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 3734ebc3239f23b7ae30a1d25b08399a SHA-1: ba7317db8890aa63b62dd034290988fbaa0f34c5 SHA-256: a36bed3707f330e2b8c53df287a7edfd69b2d219ec8bbe6d6a2fefa409749049
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting a SEO poisoning or content distribution scheme. The primary malicious URL identified is https://cctraff.ru/123?keyword=marie+france+professional+strength+kojic+soap.

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://cctraff.ru/123?keyword=marie+france+professional+strength+kojic+soap In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_5f958e5204872.pdfIn PDF document text
    • https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/1392ef84e32.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/wowiput_xixojubajofu_tediseru_bebolivafaku.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/b7d50e2acf269.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/wevona_xekipexutafame_dutizet_fatumegod.pdfIn PDF document text
    • https://lewotivegil.weebly.com/uploads/1/3/4/3/134320996/dcc792f961de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_5f8e784d0e50c.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/9570453.pdfIn PDF document text
    • https://wozogerodinanu.weebly.com/uploads/1/3/4/4/134498855/4750391.pdfIn PDF document text
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/liremege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f8b837cdb3c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_5f910b6ab2034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5f98df0a78b73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7087/2483/files/bisupubovuwonajek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9149/1514/files/29318067150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3900/6113/files/sink_or_float_worksheet_4th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6304/9879/files/5148388260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1389/7372/files/takem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/nasamuzuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4922/1785/files/sujupidewefanifiki.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B39 5420 bytes
SHA-256: e560fa5adf910965deb604e8ff6bcd71a0be84a7b383797b57c47e396dcfb291
font_01_sfnt_off0000adba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADBA 11480 bytes
SHA-256: 723bb0d703ed623b9c8806aeb9d8953a498e13e2eb788c482cdb357f6181cb1b

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