Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c7c4bda58d5e01…

MALICIOUS

PDF

43.6 KB Created: 2020-11-05 06:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9c7575240d8ec48df2afef43afbd94cf SHA-1: dfb1798cebb9189307f3505cfd6928fb6592fc8f SHA-256: d8c7c4bda58d5e0153fb61928148123afbaf2207c284d9619136bf7177749aa3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.cc/123?keyword=hailfire+peaks+map In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5f8dc3843d223.pdfIn PDF document text
    • https://rafuwufavirose.weebly.com/uploads/1/3/4/3/134334278/koreba-gobobajojev-peton.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451355/normal_5f9f8fcd1f0ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_5f95835289d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f8c76c3b17f1.pdfIn PDF document text
    • https://mukokoloraji.weebly.com/uploads/1/3/4/1/134131612/pizegabesatipuv_kubimesevugel_jalelotanudobib_laganegufuvek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5f904615b81c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/sovikavosiw.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/mayhem_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/gutetadoguduwaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/celestia_luna_class_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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED2 4456 bytes
SHA-256: 5ef1cbe5685ec0ecf796d08dc0fad5cebaf426ea1a9fb87b07100d0e6967a7d0
font_01_sfnt_off00006e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E86 5072 bytes
SHA-256: 5873ab01059b219dbc5fea76ed2bc3dbd5fb50b5e52ee44d71337f79b79576d6
font_02_sfnt_off00007fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB1 10096 bytes
SHA-256: f4a57d0b200c59e5f1189d04e06f23a0a362544c7f3ad0a731fd6fff7082a6d5

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