Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8810064018d74a…

MALICIOUS

PDF

38.3 KB Created: 2020-10-28 01:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 597fb2980da4cc69b2bc2c36d0a6c5ff SHA-1: 532ae0c4a4af45d3c3b8d0ce3e399d21f845fcc6 SHA-256: de8810064018d74a3b1683012d65d906126be9afff4459747e82a591bd3c67cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary observed URL being `https://ttraff.com/123?keyword=types+of+drums`. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a deceptive lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.com/123?keyword=types+of+drums In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405184/normal_5f92088e3724c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5f93e0929d83f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f9038472f436.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/5bde227674ac4.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/zegomotagenig.pdfIn PDF document text
    • https://zarurirabug.weebly.com/uploads/1/3/4/3/134355130/1158701.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/xijebufupuruxux_xobufal_vavibur_rezuraxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5f9333a8948f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f93931b922e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8743ada364b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f8a8ec260feb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5f9869c831d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f932efd6ad42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_5f989ade2e598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_5f967625eb0a2.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/gujutavevive/anafranil_75_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/anemia_ferropenica_dieta.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_off0000572c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x572C 4996 bytes
SHA-256: d36e2a215172e477424327c74951d1bd881088c29ed93ad21faf5ab8384801dc
font_01_sfnt_off00006820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6820 10860 bytes
SHA-256: 6bb1e195c42932f9f9d48eb600e05a8e8eb4e9c3161540ffcd0785f49645303c

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