Malicious PDF — malware analysis report

Static analysis result for SHA-256 1879f0e50e4ae2e7…

MALICIOUS

PDF

49.5 KB Created: 2020-10-28 04:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 39342bc7f877ac98bfd2f8f195f7c2b0 SHA-1: 7aa61cdd1a8c7f799c4e2cc0d3ed002a7c9361a7 SHA-256: 1879f0e50e4ae2e773a06e264ce6949b5c4bb7ccd1189eadbcec3288032ef4f3
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/123?keyword=locust+drone+gears+of+war'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector 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://gettraff.ru/123?keyword=locust+drone+gears+of+war In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421612/normal_5f976898cc25b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f98a9efdf77b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5f98d4e02ca81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5f900642d4e05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_5f9723b1923b6.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/8762215.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/gulipazumu-womokividonuni-vusifi-lasojujekamidir.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/7a183b75-d754-4db0-adb7-33097d790bee/xeguvarorejekekaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e9ea5c-1e11-435e-9882-6e51e1e7b594/pebumepepegilur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23544dc0-0a55-44eb-a1c9-7bb923cd81b4/64509622261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d091d5-ed75-4c65-b2a2-e6cc33b8a4e6/24453294029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd8277c-94df-4624-a335-8bfd49de4b72/callister_7_edio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0515/2917/files/mutirosevifofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/jodo_shinshu_a_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/32448918485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8466/7798/files/annihilation_2020_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/calories_in_food_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/56343578105.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_off00008269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8269 5192 bytes
SHA-256: 4af07e03da4c7579e12c44e87b3af2ad7b11fe46a66fcd77fe3313495a241e9a
font_01_sfnt_off00009432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9432 11168 bytes
SHA-256: fcc1e834cdbb27dc0ca353059d2264822d4e00dced319822b466489e3da6bd33

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