Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff768876ed9fb9d…

MALICIOUS

PDF

54.6 KB Created: 2020-10-31 06:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fea3d80a20f63ed79925fafd3d623893 SHA-1: b0c44e68e559c589d9d1b92e0057e26b720b04a3 SHA-256: 4ff768876ed9fb9da22876e009476e834010cc5a6f7964db477a6b923dc1e091
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=planeacion+y+organizacion+del+trabajo+pdf'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lure the user to a malicious site, likely for phishing or further 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://ttraff.me/123?keyword=planeacion+y+organizacion+del+trabajo+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_5f91113435017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5f94ecc14d2f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8f5fa40fdef.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasanag/15640983870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2239/2737/files/68715056173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3459/1911/files/motorreductor_sew_eurodrive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b3fbaa-48c2-44d4-88c1-258d8faca5f2/66191113040.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/cambio_climatico_en_bolivia_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7741/4293/files/2020_jeep_patriot_manual_transmission_removal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7235/3941/files/95184869034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/molecular_complete_and_net_ionic_equations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/curecanti_national_recreation_area_boat_rental.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8340/8578/files/casa_tomada_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5cf7bd0-67e2-4de0-ad0f-90d23eec6cf6/brazoria_county_property_tax_rate.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 1696 bytes
SHA-256: 9a98723dae936e7c7c8d502cfbcf27bf9f93cff28ba6a06675a6a95244fbc4de
font_01_sfnt_off00007783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7783 5516 bytes
SHA-256: 2ee0433f43a2df668585158314e4b33dacb56d1e92374924dbcf77a9f73f0b78
font_02_sfnt_off00008a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A69 11368 bytes
SHA-256: 2ee63bb2385a67495090001a072c98ab7bd8c17b0dbe93e04fd3a2e312757aee
font_03_sfnt_off0000afe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE4 17792 bytes
SHA-256: c3e7297188a6b1bc856e917fa3aab175d69d7ec7d725e7b2ed230cb530c13b96

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