Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fdb1f445adb60c…

MALICIOUS

PDF

46.5 KB Created: 2020-10-30 15:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 71544ac5f65681dd9eeb172187ecca65 SHA-1: ddb1e3f93c0d7b4ec20026d7c169bd2eccb74bbe SHA-256: b1fdb1f445adb60c85d90422665d1e113cf781ff0f532bd135a4aa9032e8936d
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, 'https://ggtraff.ru/aws?keyword=campbell+biology+introduction+themes+in+the+study+of+life', is the primary indicator of malicious intent, likely serving as a lure for 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://ggtraff.ru/aws?keyword=campbell+biology+introduction+themes+in+the+study+of+life In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5f8c1f9e5526c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f96dd8dd9b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f91c8c79acb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f8b0556448d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386622/normal_5f9a44527d742.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/dd83604c-bc5d-474e-a7ee-d7dc5d73a9cf/muwobekolukodusarugerag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/34443414136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30868d2e-bce0-45c3-82fe-5d5c08a76f6a/bunesotezufiteta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/what_is_briefing_flipboard.boxer.app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdf56eb-f4ac-4c91-9b1e-fd80f0c8f69a/lokizifukobonuxuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/083abef9-633f-48ed-81ec-4f0154a9c76a/33823586471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07ec4ce-1777-483e-bb28-6905e5e0adb9/kuriviguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a5a590-920e-4962-9fc3-b9b7e82b1248/73323811006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0654/6079/files/sap_hana_certification_guide.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_off0000720a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720A 5716 bytes
SHA-256: 66763f5334b98883fe2a19b063aff9e5b891e60fb8a3c9add16bf468bb898f01
font_01_sfnt_off0000854d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854D 10868 bytes
SHA-256: a8e495c8594431ed769b36e873950e85598afa47fa28a2b136ecae39b48d3691

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