Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aab63f25c230c0e…

MALICIOUS

PDF

75.7 KB Created: 2020-12-31 23:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3a1e4a841371b7cafce425ed2bd57237 SHA-1: 7ffe56343e5f4f1a7394f14ed9e0838361aaaf7a SHA-256: 2aab63f25c230c0e585fedf29d78e62dc2a65f87f57d056786b6ddf1e0294f8a
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'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=kpop+piano+games+music+color+tiles+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C In PDF document text
    • https://cdn-cms.f-static.net/uploads/4494430/normal_5fd17b64c2fba.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/dYgcicg/money_maker_make_money_online_with_mobile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_5fd82f28e2c86.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/bufexa/38661312789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b855920-662f-43f4-887e-9efd046bbd55/banco_popular_costa_rica_whatsapp.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/high_performance_all_season_tire_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/best_programming_language_for_developing_android_apps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f45f850-c802-4796-9e7e-498552b86a9b/66771819179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33c060e8-a386-47e5-b525-3bf5037161e3/showbox_apk_working_again.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a040ab88-810f-4299-af9e-f1f19dafc400/78879532781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038cfdb6-7eb9-4e26-bcfc-73427a39f138/fejorabadowaradidif.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/cisco_sfp-_h10gb-_cu1m_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/capture_the_crown_in_my_head.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC78 5852 bytes
SHA-256: 1d63ded258bf398c86209e7e72a3aa2c6386bce6fd105fc378b1ed9bde209500
font_01_sfnt_off0000df7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7B 5100 bytes
SHA-256: d10cedbe495f24c2d0b26c500cf2ca7ee1cfb4033020aac97127dcea6a1fae8c
font_02_sfnt_off0000f005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF005 1972 bytes
SHA-256: cf0d8fb5527eae19401dfc12654250517e7a38e3cc95ac791bee53c0147e1778
font_03_sfnt_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 10984 bytes
SHA-256: 58f831f4aeb40b13a7bd2b4aad462b6ff616683e2477b22bb25871ca00ea6839

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