Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eeefccfdda2e3e7…

MALICIOUS

PDF

69.5 KB Created: 2020-12-21 22:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 77eb32b5092897fd7c33e1418869c364 SHA-1: 72e0800b382a2a6af2dcca475acfd310a92f784f SHA-256: 7eeefccfdda2e3e79c7a1c5c53ad1b24360ed26b5c35582483f887b4e786a496
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 'traffine.ru'. The document body, though heavily obfuscated, contains text related to 'Microsoft translator api key', suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely used to redirect the user to a malicious site for further exploitation or credential harvesting.

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://traffine.ru/strik?utm_term=microsoft+translator+api+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5fa7bd170a491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f895c49eb367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5f8e617931de4.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/5fc2ca3a3dfdd95b60e15de0/t/5fc6864beaf37e3b647eee0f/1606846028214/bitcoin_wallet_address_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665cba51-d7ac-464b-ad41-0314fa5860c1/75996845558.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/natelixuremetoxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa5e2831-9e1f-432a-bf00-8fa25946b133/98294326737.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/dotoximagil.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/riesgo_relativo_y_odds_ratio.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/guwudep.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/christine_feehan_dark_ghost_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/ziwogosave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09506a70-b1a3-4d74-807f-73e9c9dc04d9/84950107479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1011f94-da9e-4924-91e1-a5eaaa6ea0e6/2016_louisville_slugger_z4000.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_off0000ce67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE67 5180 bytes
SHA-256: a6b7b977a3d23430597afb565074360a5ca74e89d35ef1659669e04d848636fd
font_01_sfnt_off0000e031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 11908 bytes
SHA-256: cde7adb66e95021c176515502fc23b3663e11a3c27dd55013dbb7ab41ad66d38

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