Malicious PDF — malware analysis report

Static analysis result for SHA-256 90317d077f708979…

MALICIOUS

PDF

40.4 KB Created: 2020-11-04 01:34:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9b1db50e21a958e9a64c0955a7eceaa9 SHA-1: 8080f804c8e140e699b9af511440f7230e042a60 SHA-256: 90317d077f708979d65ad50a41784a0432d7c1b96aa4cba34b0b17cb71ac096f
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm designed to funnel users to malicious sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=ramesses+ii+children In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/78e93a.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/d9565a2fd38ba.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/tikavilate-deruwebuxoreje-rojivafuza-fipazifunejip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f88a1627f6ff.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/5162177.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/femigi_tavug_jalenon_fijadafim.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/e3027c59-7daa-4d5b-8962-d7a6d5a1728c/54568332328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e113be-4be0-447d-a7b6-b0f8495c9517/barogivaretusiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae0d70d-f580-44aa-b4d1-8367f6ac83fb/litirad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48db21bc-54c7-4c32-a837-24b8a5d1e79e/75984384601.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 5188 bytes
SHA-256: 35a1a4036e07309568dbf2ba9dd1df8094084c4bedf5abb1ffcf2866699596fb
font_01_sfnt_off0000729a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729A 10364 bytes
SHA-256: 37fb8c25bec253ca3cfa7a94eb0e52b0a8ff1fffb63f2a8cb2a0aadb3ddb31d4

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