Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa25db549ff65c8…

MALICIOUS

PDF

42.8 KB Created: 2020-10-18 14:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0665841df2f1de3dcff0781070639c63 SHA-1: e4be71024d5a9c4e0b2d429de23876bdef2f48d3 SHA-256: 0fa25db549ff65c85c511e834a318b1d2f15db653d3ec830fc587e7723f0d9ce
94 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/strik?keyword=europe+after+ww1+map+assignment+answers, is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt, aligning with the Spearphishing Attachment technique.

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://cctraff.ru/strik?keyword=europe+after+ww1+map+assignment+answers In PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/merarexukokoxopi.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/7ec3108a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f87032d7b851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f8886f5dbae5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f870c4f8c4f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8b4531d5136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f87eebb664b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f870df130d01.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://cdn.shopify.com/s/files/1/0485/2609/8594/files/find_battery_health_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/vinyl_bean_bag_chairs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3675/2037/files/fimagoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/13006432877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5351/3384/files/gazelle_power_plus_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1fa2ce-baa2-4bc3-9060-51d2ddc4a433/39924228349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f591264-c591-4e2c-b79e-96442ceaf4af/dukobetumibikusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfc73ce-6869-44ef-944a-b0716bc8b4dd/48916955196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf2ceb4-2258-42f4-a005-cb2fe547da12/xiwefanefidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8f1e9d-838d-4cc5-842e-07a9480a7aaa/12680673961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d8f5c8-ceb7-4123-84f6-3d3604c0cfee/tisil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F6 5172 bytes
SHA-256: ac782d418409a95a4d218a1c409df3d593d30ed3aa43aa7fcc24de0f258563fe
font_01_sfnt_off00006b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B97 10712 bytes
SHA-256: ea6a566037cad6b466874713da43f15415687cf6605f879c0a64ee28bf441891
font_02_sfnt_off00008fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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