Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd74be0defcb8b8…

MALICIOUS

PDF

72.2 KB Created: 2020-12-17 01:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1fa700f23bfb7e9b19e7fb1482bad548 SHA-1: 6eb524d7f759aad2a0dee9e183b3921af7595300 SHA-256: dfd74be0defcb8b8ebcbf49e77bc400feb3d210e81def8763941c211c7b4227c
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 ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing 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://traffine.ru/aws?utm_term=benzocaine+by+fischer+esterification+lab+report In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_5fd177d654501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5fa2ab9967061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5fb76ef747bac.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/fajujiju/alta_ski_resort_trail_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0abf27e-ec96-4f97-b6df-e46eabcbd37e/bang_bang_full_movie_free_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf170300-4407-40c5-8031-2c1799a2aa21/stages_of_artistic_development_kellogg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb03f16-5733-49ce-a4d1-03c08be10d55/student_of_the_week_virtual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02284b9c-6991-4bff-a919-9a60a6098cdf/the_screwtape_letters_study_guide_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d1fde5c7695ca9b4aca3/t/5fc7e6303fd7ff413f70b215/1606936112311/zuliropezefimof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5db0916f6d44b07e08f00/t/5fd186f7133bcb3b88964e9f/1607567098650/pugavovubuwewi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4eed3c02f22b9d03bd9b/1606373105709/golden_claw_item_code.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/casca_the_eternal_mercenary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f127aa-092c-4a5a-905f-619d1827eedf/caged_bird_poem_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce1b29cd8500165ad4a92d/t/5fd67cce267c8d0ace4b2332/1607892174943/6604581839.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_off0000dcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC2 5444 bytes
SHA-256: 796cb5f47c2c84236af184d86b9d69cc1ed3d49e4b87afaa16689629fbced4dd
font_01_sfnt_off0000ef52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 10780 bytes
SHA-256: b70b89ef6052000299b532f19c6d26da18bd2a39d9209dc327cb924ebdc1e33d

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