Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d95511d48078430…

MALICIOUS

PDF

63.1 KB Created: 2020-11-03 20:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7e31ce946342eaf00b705fdbc1344d43 SHA-1: 8674f7eb5d4696cdae09c8e1a630bd9b89d95c71 SHA-256: 7d95511d480784302bc693abbfc45c0520af1cc4fd57fc85f25166c915c3d17e
94 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://gettraff.ru/123?keyword=prelude+in+c+major+piano+sheet+music+free'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

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://gettraff.ru/123?keyword=prelude+in+c+major+piano+sheet+music+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_5f9d83a15ac4b.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/c80963ed-4b27-4154-8abe-95f74ba8414d/vampire_dark_ages_tzimisce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0183b19-1cfd-4b10-a7c1-5b23b2a8aeb9/56347001282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49eba35a-7c35-4014-9903-0638b9172333/jepepavudupojowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef2e750-669f-45d6-8b2e-fe86d514feab/koronerubipokufuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dbe08bf-1d73-4aca-b328-d554be483eff/15729312176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6780fa-a983-4ff4-925b-b61e163be185/33203989175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7962e597-ed34-4c7c-a0f1-8a9ea7293118/sojewuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a94846-ea1c-476e-ae4a-9444457ee831/josavifuwatinejaseluzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b5e39c-4c1e-46db-ac87-c798ea07a211/modern_combat_2_apk_file_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/53074050743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75c2bde-7a5d-4c5d-954e-4864c78232c7/dosonuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3b846e-4aea-459b-93a4-86d90420764f/59402808550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdcaf7df-9062-43ab-bf4c-a4522ff6a976/19483723399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f18d9ed-1cb7-4c6f-9539-55dea11b2a4d/tovorumamadobudox.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c5c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC5C5 23528 bytes
SHA-256: e4b2aae85098076871ae160d5602ac29943e5cac35167ba50e82ba1b5c4e421a
font_00_sfnt_off00008eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEB 5472 bytes
SHA-256: b12fe132850e1522d8256de054de62f833044a27a2a7b329f816b2e905308938
font_01_sfnt_off0000a15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA15D 10596 bytes
SHA-256: bd352093e3ab2d7db410bf643640ee902625251fa5c030253388961995f7f5f7

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