Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cff308cafa43b1…

MALICIOUS

PDF

42.7 KB Created: 2020-11-07 00:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f7117b293c337995f2cf9ffc14f4110c SHA-1: 2da4b2edded82bb2dc93f8c9582df29d09ef4659 SHA-256: 54cff308cafa43b15d00983a5f6731781147f9c5df1c5d5f3d9deb3d28d5581e
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, including one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to be a lure related to a 'men on strike' theme, likely intended to trick users into clicking malicious links. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, potentially leading to further malicious content or phishing pages.

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://traffmen.ru/aws?keyword=men+on+strike+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_5f958329d015b.pdfIn PDF document text
    • https://wikoriduban.weebly.com/uploads/1/3/4/3/134341401/2ae785ca146.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/3180277.pdfIn PDF document text
    • https://kunizemofowirux.weebly.com/uploads/1/3/4/3/134311671/duzatesem-gigatotulirisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_5f9ea1029e050.pdfIn PDF document text
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/5029140.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/9325561.pdfIn PDF document text
    • https://mizemetugez.weebly.com/uploads/1/3/4/3/134322353/d824a057b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5fa5c9bc90f47.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/a44222d806e.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/1015687.pdfIn PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/rotubete.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://zopagova.files.wordpress.com/2020/11/webepaxu.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_off000068c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C5 4864 bytes
SHA-256: af89d7ba96ce59838f463185f5553ba494c51dce094c8f10ae78e3f3a5e63178
font_01_sfnt_off00007971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7971 10864 bytes
SHA-256: 2e357660ea140eef0ff8da7d2eac48e718d8ab183bcc21ca9c55e38f1a0b92ff

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