Malicious PDF — malware analysis report

Static analysis result for SHA-256 380ced643bf29745…

MALICIOUS

PDF

42.7 KB Created: 2020-10-26 08:17:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2055042541d78dceb2de7bc7712d580c SHA-1: 1f73d7f585f40286f6534d19bce2436b91ffa5dd SHA-256: 380ced643bf297450180477538e705bfcdc201738142c72cd3b13d8b71449f07
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/pify?keyword=copy+worksheet+in+excel+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f870920c8535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f9037774ffc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f8e7a3f09cae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f8a9c79080fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f941268924c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_5f8f63063186d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8ff67d392d0.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/henghuili-files/71415367118.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/soken.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/mba_fundamentals_accounting_and_finance.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/fish_parasitic_diseases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2f806a-36f6-4114-9e2e-29080ac5d4f7/69229786503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ee6fc5-218e-403f-b7f9-0364434e35c8/dibefabebafip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0542ef76-9faa-4cb2-9509-404d889167db/15425234823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80073071-1df0-422e-9668-9e5ca43612f0/les_temps_de_l_indicatif_exercices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31885dd9-f82e-4809-833c-a56620ca25be/rovisixegoniradoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c48b3e98-88d1-401c-8c0a-7a5f1ecb4ee5/frozen_karaoke_machine_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252b1924-8cd3-4510-9de9-1bbf42324c60/11174049068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99071e9a-436c-41e9-813f-0b057f6eb4cd/65136732952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa04d1cc-8efe-48cd-abbc-e847ccbc6cda/kudapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a0b993c-8aaa-4da6-bf53-a0c80308cea5/sotenozelox.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_off000068c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C1 5316 bytes
SHA-256: 5c77ee15ee2d9c22504d4b196c5fc0ee3b6a8c400b70902a82ba3777036fbf92
font_01_sfnt_off00007af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF9 10024 bytes
SHA-256: ebd0b95aa6ec2486094be108e4ec557f49ed3b3142677dbb43437bf6a8c6e40e

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