Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bb9b2cf9c2f19d…

MALICIOUS

PDF

68.3 KB Created: 2020-12-22 20:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a168776f390f2fc43820791ca8fccf9 SHA-1: 1e26002796ad5253a24f7d8172a37090fcb46d43 SHA-256: f7bb9b2cf9c2f19d795f37a54c37467d131fba850ab9e8ad4e693f930c2a95f7
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 'ggtraff.ru'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=ice+cream+cone+cupcakes+martha+stewart
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5fb82f6d687ac.pdf
    • https://cdn-cms.f-static.net/uploads/4494417/normal_5fab9999d2b0c.pdf
    • https://cdn-cms.f-static.net/uploads/4451353/normal_5fa77b25156d4.pdf
    • https://static.s123-cdn-static.com/uploads/4416144/normal_5fc44d7d360a5.pdf
    • https://cdn-cms.f-static.net/uploads/4389801/normal_5f977b6e89a7b.pdf
    • https://static.s123-cdn-static.com/uploads/4417990/normal_5fe183dabb058.pdf
    • https://static.s123-cdn-static.com/uploads/4366032/normal_5fdd6d3e29212.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/044f609b-cb1f-4eef-ae81-7d79e7137972/jufetilakevafazisetewo.pdf
    • https://s3.amazonaws.com/numegubowalonan/let_it_snow_three_holiday_romances.pdf
    • https://s3.amazonaws.com/zuwimadaneb/dreamweaver_trial_free.pdf
    • https://static1.squarespace.com/static/5fc54070c14dfd36fe0e2b11/t/5fcbf91374a40730fb83b49c/1607203092041/usa_today_country_music_charts.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_off0000cde9.bin
f93f35f72dbd917d291794cb46e3ab004fa20d1f253d7f0428e2ee4392ed2a3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE9 5232 bytes
font_01_sfnt_off0000df9a.bin
30f63051ecb8cc415621163733f3745b22708dd8ad5c40025ae050a95c2a343f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 10812 bytes

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