Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d97f2adbbc0f2c…

MALICIOUS

PDF

79.7 KB Created: 2020-12-20 21:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 682022719763e48906ee7c749ecd08a7 SHA-1: 1a1926f442c0d1ddabf300806aeb5fe58b76c49f SHA-256: 80d97f2adbbc0f2c818b5211c2498f2d9d8a7273441a0eef2ffd83128160c643
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://cctraff.ru/123?utm_term=kabuto+naruto+voice+actor'. ML classification and ClamAV also flagged this file as malicious. The presence of embedded URLs and the nature of the redirector suggest a phishing or malware delivery attempt, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=kabuto+naruto+voice+actor
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5fa39f3076d66.pdf
    • https://cdn-cms.f-static.net/uploads/4446923/normal_5f9f8082c290f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/178127f3-cdd7-432f-a166-61c8b49d1765/74942163926.pdf
    • https://s3.amazonaws.com/wixanarer/free_florida_residential_lease_agreement.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdefcf173fb5383b6712c3/1606283216640/62981277790.pdf
    • https://uploads.strikinglycdn.com/files/3a536708-8e4f-4328-b9bb-e8b7d07a1293/soup_and_salad_near_me.pdf
    • https://uploads.strikinglycdn.com/files/546c5890-421f-4754-a3b6-7e1ccc88fd7f/36207345784.pdf
    • https://s3.amazonaws.com/jafujasiwetid/14176656702.pdf
    • https://static1.squarespace.com/static/5fce2dc706af1e3f448c2ec4/t/5fd69c85226e9048fabfbd1b/1607900294150/maths_general_knowledge_questions_answers_class_8.pdf
    • https://uploads.strikinglycdn.com/files/7493a01f-0912-432f-ac5c-afa424f0df12/watch_iron_man_3_putlocker.pdf
    • https://uploads.strikinglycdn.com/files/3f11e83e-586b-4fdd-8a60-c625b94fb21b/el_microscopio_optico.pdf
    • https://uploads.strikinglycdn.com/files/3f1d634c-95d9-427a-9af5-b1c4ef14c5ef/pesticides_and_herbicides_an_introduction_crossword_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7df.bin
e81372b68485333eff9864fd69a46f1be639e016d03e6196c15f20498ad39ad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 3688 bytes
font_01_sfnt_off0000e4ff.bin
d8a5a70ddf910c1d8d9e0bf8a63e882c7447a84f2674b54cbd02f9f8b875455b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 4752 bytes
font_02_sfnt_off0000f546.bin
601a9c48a1cf30e4e729bc9622eab56402835e05b8f8599fdc18dadeae043a08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 11812 bytes
font_03_sfnt_off00011ca4.bin
1a7476a9bb3adfa4973fd7d74adffc1dbd27b6ac9c0ab66149a6cce8f0d3905a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA4 16148 bytes

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