Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7fba1bfb46a968…

MALICIOUS

PDF

58.6 KB Created: 2020-12-19 11:20:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 86ff360175baedd47725e0af1cf45ab4 SHA-1: fde8ce9ae8ccb033edeec3d411b76917d554f2c5 SHA-256: be7fba1bfb46a96811926a00e8e3c25bdd7a018f95764cf3e097c8a2bef92d23
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified as a redirector at "traffmen.ru". The document body, though heavily obfuscated, appears to be a lure related to "charlie puth sheet music piano" to entice clicks. The presence of numerous external links and the critical heuristic firings strongly indicate a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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://traffmen.ru/aws?utm_term=attention+charlie+puth+sheet+music+piano In PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/zegabileniwiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5f967b5ae72bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0bf1b9955c744b53ac36d/t/5fd164831693665fc7c4adcb/1607558275496/95644184178.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/97482758298.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2a692dcd53187f1e8c64/t/5fdd99b251a86c1b6c1114df/1608358324040/commando_2_movie_in_hd_720p.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2afa6394b41d6424bc80/t/5fdd2efed85ca26442e3db95/1608331007068/40235000720.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5795a7d0c8f249d5fd100/t/5fc7c7e18c4551503fee8206/1606928354692/nanofamatol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0a02a97599144ebeb85d/1606289925452/nejifiwazabezo.pdfIn PDF document text
    • https://s3.amazonaws.com/nujosuwemedadi/brevard_blackboard_learn.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/61913170645.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_off0000ab4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB4D 5164 bytes
SHA-256: 8b181a0e8d72f7e9fced52c78759d0403006a58caa71425b7e3d362abd8a9253
font_01_sfnt_off0000bcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCAD 9688 bytes
SHA-256: a363db69b6a36bab7d3ee4149634dd8912ae6aadac2f2f7234861a0d37f1ed38

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