Malicious PDF — malware analysis report

Static analysis result for SHA-256 8183c628b4a973a9…

MALICIOUS

PDF

39.6 KB Created: 2020-11-02 20:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 425854ebd42088530ec9ff872620eea5 SHA-1: 3a0113622a78e6c122c08d73b2a9f0ee1102016b SHA-256: 8183c628b4a973a95e5e5cf5cbcc151a393392023c7fcb915f72ca2876772d45
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector infrastructure. The embedded URL `https://ttraff.club/123?keyword=exit+417+i-40` is the primary indicator of malicious intent, likely serving as a lure for further malicious activity. The document body, though heavily obfuscated, also contains this URL and other URLs pointing to potentially malicious or benign content.

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.club/123?keyword=exit+417+i-40 In PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/golevinujenig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f9c59391543a.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/a65ee92.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/e80b53629f408.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/258ad3d0-4177-4825-bf60-52c0478408e2/91775123783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6855/0039/files/77526647024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3331/1897/files/somatic_and_autonomic_nervous_system_quizlet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8478/2004/files/56569574474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9746e6d6-cc3d-4414-bdd7-08332ffdb8f6/gatokutelezopiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb48f22c-7253-48c6-9463-022df6c8f0e6/album_bts_hyyh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c826a9-0594-43be-9b27-e1d79aef20fd/60426497776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805b86de-9e3a-4dff-b6fc-d041ca25dbce/texto_argumentativo_sobre_el_tabaco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3680/5800/files/a_level_photosynthesis_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8c502b-92a5-47ef-93c2-b8f1411fbcf6/72844819858.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_off00005dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBF 4584 bytes
SHA-256: 03c01f413f51626b857d795a035e9584670b574029a2bc5cb9e86be14c28237c
font_01_sfnt_off00006d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8D 10696 bytes
SHA-256: ecad783c09f92cf1324654f1c0be75534e3fa2df6fc4220c22a355f81d1c3d05

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