Malicious PDF — malware analysis report

Static analysis result for SHA-256 0684ac5aa6d09a86…

MALICIOUS

PDF

87.1 KB Created: 2021-01-10 03:31:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6f1618c15a78509c26594b64d4ab60da SHA-1: ab33ba048038da2b1551ccb2c93059a67a5e9e0b SHA-256: 0684ac5aa6d09a86df752fc3cb0f5c8b32f19fece723161f80945bb3b16711aa
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'traffmen.ru'. This URL is presented as 'performance tool brake bleeder kit instructions' within the document's metadata, indicating a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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?utm_term=performance+tool+brake+bleeder+kit+instructions In PDF document text
    • https://cdn.sqhk.co/lilapanorup/UQNcrYs/thai_language_alphabet_song.pdfIn PDF document text
    • https://site-1178101.mozfiles.com/files/1178101/fixubuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489609/normal_5ff4822986428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5fd9a26b153db.pdfIn PDF document text
    • https://site-1171658.mozfiles.com/files/1171658/pixel_survival_3_hack.pdfIn PDF document text
    • https://site-1174730.mozfiles.com/files/1174730/gerinosovilirazaveja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387701/normal_5fcfe5820b619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_5fb3d4cde2dcd.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/jdkifr0/blue_bottle_fly_life_cycle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/naxozelozude/64121817130.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0A 5252 bytes
SHA-256: 84f12919c3058e2a5ba65a6dc16eccb457a496fd3cbcf0eb3f05d3e25e7b5dff
font_01_sfnt_off00011dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC2 10380 bytes
SHA-256: a816a8cc999a8db87c87155f1da987de6632cc1abf471f4701bd0617ce30d0b6
font_02_sfnt_off0001411f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1411F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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