Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ef6fa46540ed04…

MALICIOUS

PDF

38.2 KB Created: 2020-11-02 05:07:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5ae40286d2e07c3ea9b79ba9dbcadb5d SHA-1: bd5f62da3bc8c5425613d48408f0c94af4ca4966 SHA-256: 50ef6fa46540ed049907f224d69af1bcb30b18864545f9f3f60a71c4dcaf3e5e
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'swords and sandals 3 unblocked games' and the malicious URL, suggesting a lure to a potentially harmful site. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's part of a link farm on disposable hosting.

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://ttraff.cc/123?keyword=swords+and+sandals+3+unblocked+games In PDF document text
    • https://vuvofazomegudej.weebly.com/uploads/1/3/4/3/134329778/xakinu.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/88842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_5f9ef511c285a.pdfIn PDF document text
    • https://kudizuvawemexol.weebly.com/uploads/1/3/4/3/134307781/vopinipipejujabat.pdfIn PDF document text
    • https://falizuzu.weebly.com/uploads/1/3/4/5/134506804/432395.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/jazuravazaguz/51269321148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881f086a-21d0-4f8a-9d73-fb58bf566102/celtic_woman_tickets_2015_members.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/feduvibufifekaxuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/ran_man_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3141c374-51bc-45a1-802a-edc74250ad37/5392991302.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/2489003378.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/67212955238.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/1st_2nd_3rd_person_worksheet.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_off0000530b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x530B 5824 bytes
SHA-256: 5c75354f8a4971555cf69c7e4270453d39667e4f561b6c1a055046bb1082f7c3
font_01_sfnt_off000066d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D8 10900 bytes
SHA-256: 941f1cf5d94ecee252c140d61b00efac1ef578461c6f5db8506e29db4bb8d0f0

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