Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ff595dc92bca6c…

MALICIOUS

PDF

68.5 KB Created: 2020-11-22 08:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f079d36dfd824111e17203a506529a2e SHA-1: 9743f869baca656a70f93482244583b2c0abdb02 SHA-256: b3ff595dc92bca6cd1d0f6d0580aadd97f9badd9a1a5265fe58a03defb6897fb
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The primary URL, 'https://gettraff.ru/123?utm_term=comcast+tv+schedule+salem+oregon', is flagged as malicious. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized document. No scripts were extracted, but the structure and URLs strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=comcast+tv+schedule+salem+oregon In PDF document text
    • https://boleturem.weebly.com/uploads/1/3/4/3/134398498/nawapuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_5f9018ad3683f.pdfIn PDF document text
    • https://fiduvoxasugi.weebly.com/uploads/1/3/4/8/134856114/80ba08bb84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_5fb02cb1e8ff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5f9a8fa15bea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5fb8f094198f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_5fb91be8ec929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5f9a55e90a417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426954/normal_5fa7e9101b24a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xupimaral/40x_escape_walkthrough_13.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/bestbuy_sd_card.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/91091450817.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/free_indesign_templates_envato.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/black_mart_apk_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/mesh_analysis_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/revinubaramaredibe.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_off0000cd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD65 5316 bytes
SHA-256: e757686ac615c76b5532031549a1c3f17b846f98cfd4abf5e9d6be62838f37ac
font_01_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 11312 bytes
SHA-256: 212ac2e8f8bf5bf405b3d2ca88184025971cb7bf0a09f718a9cec7672bd53e5a

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