Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d256fa2b94b140…

MALICIOUS

PDF

102.3 KB Created: 2020-11-03 03:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cdcb44efb61412dd847c48f323843ae5 SHA-1: e045d5bb7d9e4527d1a7c2f32c9045365f19f526 SHA-256: c8d256fa2b94b14069e118b54c8d82804b5a3fe49a1680e380b45a560367a304
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, 'https://ttraff.com/123?keyword=prince+charles+and+camilla+2018', is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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.com/123?keyword=prince+charles+and+camilla+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_5f9676759493d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f8da05027c9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f8edc9d021f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1607ffb6-3b61-455e-88f7-0ede98899487/lanafuwetakatimar.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/66110139850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2005ee27-8d58-478f-92ad-fc2fcd6639c5/central_machinery_drill_press_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf4642c-1354-4c0a-871f-55e8fc378a9e/87202238514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7554f05-4524-4821-b6c9-832805a3d1f1/drilled_shafts_construction_procedures_and_design_methods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca2b079-8444-4883-a241-785260512af4/sinabitomifusafopedujez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0983c1d-628b-46ba-b8a8-bf1a39743c63/belozazitujegerapetolo.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/torodugobisujazifijetitub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b34c9c64-f5ea-4569-8df9-d4e1167a38e0/runomaxudidexokifagaruwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4e0d5c-f194-47c0-ad69-c41375fdb032/dibakururese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b090488-8657-4d10-a901-bcfea440a534/90043749980.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13865 2968 bytes
SHA-256: afcae459a23cd8fad60e71fa482ed795063b178ca7a96d5a337757ed3e51a98b
font_01_sfnt_off0001430b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430B 5300 bytes
SHA-256: ec5bb0f184004b44be42e5cf44ab2d07f524224c095cebb0ca765acf72391ae5
font_02_sfnt_off000154c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154C0 12320 bytes
SHA-256: 27f28e2918366903a052510468731d1a2e994c9f4e35c944db2217333dca031c
font_03_sfnt_off00017d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D06 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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