Malicious PDF — malware analysis report

Static analysis result for SHA-256 542c7589a3929576…

MALICIOUS

PDF

67.1 KB Created: 2020-11-23 03:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cacf98757fae44895e08cb86acb4480b SHA-1: 869434f33a377b058901bd08521bffa579c99887 SHA-256: 542c7589a392957624602a7dae7dbdb706222220ad6e3e9a19e22d774df451d5
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 'https://gettraff.ru/123?utm_term=diversity+and+inclusion+discussion+questions'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=diversity+and+inclusion+discussion+questions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_5f98663bcc050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5f977af53642a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5f8c254d0ae06.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/xebuvuwov/lemimexamedojikomuvij.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/fiduvemoxobune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53209475-68a7-4fd6-a44d-8b77859f81bf/gopekigizebufa.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/zaxuwefupewepuradixaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2cdc0d7-6591-48c5-8090-54760163cefb/jejozegazefiwofebobivepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c706c1-51f2-43d6-94a0-aa9679c1393e/pre_assessment_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/bose_factory_renewed.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/relanuvofakelisoxepewi.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/27305001439.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/cardinal_rex_lawson_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74bd51ac-731d-4195-833b-ea1f0a5bb757/engineering_fluid_mechanics_8th_edition.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_off0000c7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E9 5220 bytes
SHA-256: 5e58712f1e700fb4ff1cdae4350321a1937b81d9b4e2b7b463d04245bbee11d9
font_01_sfnt_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 12128 bytes
SHA-256: 78f946c1deaf4366104e25e6e4f34d30569e2838ab31ca7fe6eecf26f617fb1b

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