Malicious PDF — malware analysis report

Static analysis result for SHA-256 304b2249285ee632…

MALICIOUS

PDF

43.9 KB Created: 2020-10-28 03:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6db1bf24b772f8914ae1f07f4c747469 SHA-1: 7ce0ba9f4cc40bfdd34660bc775968697885054b SHA-256: 304b2249285ee632993fb9f69b0b1547391cce1b7c8d5bb4ececfc217448d8cd
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://ttraff.me/123?keyword=blue+like+jazz+pdf'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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.me/123?keyword=blue+like+jazz+pdf
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5f8d672a0a9a1.pdf
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5f982b0f67f71.pdf
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f969146382fb.pdf
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5f8bf720de15a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/subud/mevirika.pdf
    • https://s3.amazonaws.com/tulosa/dk_space_encyclopedia_free_download.pdf
    • https://s3.amazonaws.com/vuliwisuwig/apostila_auditoria_ambiental.pdf
    • https://uploads.strikinglycdn.com/files/866e3d5b-f952-4170-9537-6374defd1e88/wogumogofiputibogar.pdf
    • https://uploads.strikinglycdn.com/files/01839eae-d586-4de8-b153-3fa7f65b73e8/63598718688.pdf
    • https://uploads.strikinglycdn.com/files/6adb847a-654c-4a94-8e12-e19c9923d55b/74783036990.pdf
    • https://uploads.strikinglycdn.com/files/8ca63fd9-f67c-4617-afd1-f3a07373c26f/audit_books.pdf
    • https://uploads.strikinglycdn.com/files/c5dd742c-7ea1-4c01-b9f7-3cda45a8da0c/2014_frq_ap_biology.pdf
    • https://uploads.strikinglycdn.com/files/cb7029fd-1f53-49bc-b17d-21dd153c29e0/paxixonezadepejos.pdf
    • https://uploads.strikinglycdn.com/files/80b96b93-4923-495a-9986-132d8c658bad/kenesorafakaveguzumuwo.pdf
    • https://uploads.strikinglycdn.com/files/cede2969-e7f5-480f-bc1f-517314850593/bufibowogol.pdf
    • https://uploads.strikinglycdn.com/files/995a5349-b5d7-4d26-8fd3-459d1a0684dc/92527862272.pdf
    • https://uploads.strikinglycdn.com/files/a6a37da0-138e-44d6-9ede-5bdeb4cba1bf/vajabojafupozimegosavaxen.pdf
    • https://uploads.strikinglycdn.com/files/e507e7b3-f6b6-4082-9178-dc28c2af8c89/23549499452.pdf
    • https://uploads.strikinglycdn.com/files/7e937167-73c5-4b68-af87-cc80112af9b7/77639261403.pdf
    • https://uploads.strikinglycdn.com/files/56636bda-dd66-4a27-b08d-ce4e2cc2b90f/viwafomudodazek.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_off00006efb.bin
e95e534640caa4cd3268be6193a2715a95f9ad41daf7012b286b4646f2457bd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFB 5000 bytes
font_01_sfnt_off00008027.bin
608c0f2a07fa833f0440c009f99a6d7cba777b50c17a82f783480188c93f952c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8027 10020 bytes

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