Malicious PDF — malware analysis report

Static analysis result for SHA-256 2721f3d6dc09c376…

MALICIOUS

PDF

40.4 KB Created: 2020-11-01 01:23:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dbb9fe0d41e9a883b6b52135e32cf594 SHA-1: 33d610199424e30384f18b0e6088f7c298e67a67 SHA-256: 2721f3d6dc09c376670ec3cca19d6d263ffc6f446bc87385dde64f91caaeedb3
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ggtraff.ru'. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a link farm or phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect the user to potentially harmful content.

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/pify?keyword=alma+lopez+love+at+first+flight In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5f9de0925600a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f928e421024e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5f9aa6408bfbc.pdfIn PDF document text
    • https://rutizinudepedo.weebly.com/uploads/1/3/4/4/134483735/8933006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_5f99d050ac1fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8b7bd954e6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f966912ed61b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5f9dea479244d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f86f4ab61390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_5f9a45f4e00a7.pdfIn PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/jevubabime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5f9a62f7adf1d.pdfIn PDF document text
    • https://zipemulobob.weebly.com/uploads/1/3/4/5/134528333/vosevesipigor.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/1/0498/0601/6674/files/5416162699.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_off00006206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 5412 bytes
SHA-256: 4eeb43726ba9e979b9de878c9abf4604365d455841e671172965c2decbb765a1
font_01_sfnt_off00007457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7457 9596 bytes
SHA-256: 7216acca232cf2bf04766c0cb2680387d7c2efb2e6899b6e160eb63329a74e9e

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