Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d41dc28ec14906f…

MALICIOUS

PDF

69.4 KB Created: 2020-11-20 08:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 637b34e7212e96e5ff2b3f08bf5c122d SHA-1: dbe9540ce165da5f72381c32b4f46c0a27b9aa4b SHA-256: 2d41dc28ec14906f28926edc17fd2fabc3bb34045b6d35c5be4383e1f2d1e5f0
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'. ML classification and ClamAV also flagged the file as malicious. The embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=denotation+and+connotation+in+semantics+pdf
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f882e0d1aa36.pdf
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5f9e8db08557d.pdf
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5f95ee43c32b7.pdf
    • https://cdn-cms.f-static.net/uploads/4404727/normal_5f9a17939730a.pdf
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5fb37aaf27c78.pdf
    • https://fokomowopijav.weebly.com/uploads/1/3/4/6/134643156/komujewo.pdf
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5fa64156ccdae.pdf
    • https://fukoxifixe.weebly.com/uploads/1/3/4/4/134460993/3e1989a00.pdf
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/89bc2d1ae.pdf
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/dizaxikofaz-fuwivuno-fupemi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pazifetanegapu/life_after_death_free.pdf
    • https://uploads.strikinglycdn.com/files/89424126-4abb-4194-b5e2-80fba0fe86ed/56549978969.pdf
    • https://s3.amazonaws.com/boxalewijim/68340165675.pdf
    • https://uploads.strikinglycdn.com/files/40694e98-1018-482b-9c01-516a08000ba1/83517628782.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_off0000d26b.bin
76a4e601bacb84cd05e711b2b9f16c289db4844cfe9049424d808f9fa9467a3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD26B 5172 bytes
font_01_sfnt_off0000e3ff.bin
bd8cda3e535c9ecf8a22b9ad26f4a5d3a0f65b1608e51e05be4d06ca32875fd7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 10752 bytes