Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6452cc1e891fd83…

MALICIOUS

PDF

99.3 KB Created: 2020-12-18 16:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dca191d7cf2073264aba4dc2a5a13f90 SHA-1: d1f85125efc037bfc16c15b078fa589b6fb394c8 SHA-256: f6452cc1e891fd83d1a5941f45d17ea976dcbbab66dbbef3fe7c5d774be7de90
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://cctraff.ru/123?utm_term=nyc+to+fll'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the nature of the heuristic suggest a phishing attempt to redirect users to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=nyc+to+fll In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f9a135a5fde1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b76396-4406-49ac-a859-58839fcb7c9a/ios_pokemon_game_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/135e7844-d529-44ef-a3c4-3e9c02a2591f/madonna_sex_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4a65173fb5383b9869c1/1606371942011/recaro_car_seat_fitting_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdef6b9b1ed035389f5ea7/1606283116059/terraria_apk_full_version_free_download_ios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf531fe6d49a06bb88a6c4/1606374176864/2012_sea_doo_challenger_180_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c1bc956-1d56-41d0-818a-716948482ab9/kopujuvodavenimojakadumem.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/gutigoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ced7d09-9f1b-4881-b0b9-3fab738951be/58091489282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67295857-fab5-48c1-8192-e763d18dc9e3/35509149560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72afc3db-7e9d-4dfc-a74e-de6c593f12a0/chemistry_structure_and_properties_2nd_edition_by_nivaldo_j._tro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283d07c9-505b-4605-b040-3309d784ebd2/55272479117.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/54500937311.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c0aca13a450bab00226a/t/5fcd718b5177ea328cd73585/1607299472696/bubble_bobble_4_friends.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_off00014ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA5 4464 bytes
SHA-256: 8097b3c77771638f4074b83e47add7b9300af3b5b2619a3571a67200e2a8aeee
font_01_sfnt_off00015c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C02 10780 bytes
SHA-256: 75f2913f51aa46f77d865054d4241a8b6a3a31eb68753b905917872f1829f60a

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