Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6cc883d6f03329…

MALICIOUS

PDF

37.7 KB Created: 2020-11-03 16:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 559074bb9be139ce226529f770d0ef1b SHA-1: 75a35f7a8313e8ecf2c7e2b2e31d52cc737c7dc4 SHA-256: 4d6cc883d6f033297489b0f1539c5132371ec6b91a8d9c2210ff862c4a1a8e5e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the malicious redirector link strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ttraff.cc/123?keyword=canton+high+school+mascot
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f9aee9a28ba8.pdf
    • https://cdn-cms.f-static.net/uploads/4408863/normal_5f9a1467b0a62.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tokit/lenebosafemunuvevi.pdf
    • https://s3.amazonaws.com/buxoparadazegu/fudujagaraw.pdf
    • https://uploads.strikinglycdn.com/files/4b593505-a3d5-41ef-a613-9ec1d6d75682/25784819308.pdf
    • https://s3.amazonaws.com/kavalukato/bujeru.pdf
    • https://uploads.strikinglycdn.com/files/d4d78da2-e129-406d-9c1a-37c989d0633d/26479315396.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/keromufarim.pdf
    • https://uploads.strikinglycdn.com/files/7464beb5-25b2-4281-aad2-d8b5a4b618e2/parallel_structure_worksheet_rewriting_the_sentences_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0482/7909/3409/files/49590809838.pdf
    • https://uploads.strikinglycdn.com/files/5c072807-fbe2-49f9-af43-b356b74b09ff/xotarapalobogelagunelozu.pdf
    • https://s3.amazonaws.com/nimuwet/to_kill_a_mockingbird_chapter_12_and_13.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054ac.bin
31c89cf8a51fa07f9bb124db485353c7680969b38ac8b48c4fd5623afa78a17c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AC 5024 bytes
font_01_sfnt_off0000659e.bin
4d847a604fe080d262ecae38821a9038813876d90c3ef1be31e4a12201f2081c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659E 10732 bytes

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