Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74b7222644361bd…

MALICIOUS

PDF

33.7 KB Created: 2020-11-07 01:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5c6025976db5d801ee2cc32b7b26eee9 SHA-1: 22b6b72a3db036cbf8f4bdec61a87a1af1b5d953 SHA-256: c74b7222644361bddb96468fea2e6880b1dad69044e13e838f6e7c9f7f07b7f3
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/aws?keyword=molar+mass+conversion+worksheet'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the embedded URL and the nature of the PDF document suggest it is designed to lure the user to a malicious site, likely for phishing or to download a secondary payload.

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/aws?keyword=molar+mass+conversion+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f8f1ab9a1633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_5fa53b4b6dfd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f8a0b96b6837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5f8fa41a22c81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f9c1bdb29264.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/sukobogixe/lezawukadox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0bff7f8-3bc6-4907-8a04-e1285670050f/xadonepowozikojavusavo.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/bosch_dishwasher_800_series_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/xetedajamosa.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/double_dapple_dachshund.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/c_value_paradox.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/lawudoginufowewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92136697-e601-43bb-a465-073cc01c35ad/wafupijagafazamowosa.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_off00004666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4666 5260 bytes
SHA-256: 3fa35ecd60891ac4bf0f7df3fe2c064a139168f0ba91f61e73df0e35d489a0b2
font_01_sfnt_off0000583a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x583A 10252 bytes
SHA-256: 21e83a3602f3902e4d29dba798e7dbfe305d86a619d9ec3200a78a66214fc1c8

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