Malicious PDF — malware analysis report

Static analysis result for SHA-256 496701de39731ccb…

MALICIOUS

PDF

63.7 KB Created: 2020-12-15 17:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2860bb4d2702e56d23f7807cbe1d1ae2 SHA-1: 9d2f20e7cb73d8265b162167ca4e4c2716fe9b40 SHA-256: 496701de39731ccb72f2ed8ade8b275cd58ed2bd0a220503ab7db0349de77914
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ggtraff.ru'. The document body, though heavily obfuscated, contains text fragments that appear to be related to legal matters, suggesting a phishing lure. The presence of numerous embedded links, many pointing to external PDFs, further supports the classification as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=arlington+district+court In PDF document text
    • https://static.s123-cdn-static.com/uploads/4492529/normal_5fc9425594a2d.pdfIn PDF document text
    • https://gibeduxobiwutu.weebly.com/uploads/1/3/4/7/134752611/rokudezifuw_zakonapur_gumigosixasok.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/5fc1c1fef9866f3fd2da6514/t/5fcbfd008a55f2188b62251d/1607204096849/mmx_climb_dash.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/calendar_template_for_mac.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36d1d405d5340f339be82/t/5fd09aa289fd2c07d106d176/1607506596608/zejexisozexodenivuzar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df92e056-5c8f-4c76-b56c-42ea430d0129/rimisetogililul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc361aa8139af03765501cd/t/5fd038e40c0c9b10ab00e9a0/1607481572643/best_dirt_bike_wallpaper_hd.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5197abd14ff0dd2b7be46/t/5fd0096f01d3ff2a5398c724/1607469423750/73267342649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04717acb-d36b-4187-a693-efb271d6aaba/resoz.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/becker_cpa_far_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d2a4f98375720d6a8cb/1606372650728/86393070905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ceaaa9-cafb-483b-bbc0-418b0be28dfc/pilajewelu.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/back_formation_morphology.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_off0000bf6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6E 4888 bytes
SHA-256: b12a2ce2563619e02c4bbcdf1f512460d5484fb7b438f26817b2bbf6a07e7511
font_01_sfnt_off0000d021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD021 9992 bytes
SHA-256: b3bb6984f1246368cec3011901336f8bf8630c650d1cb8390f41a271531d3869

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