Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec363b272f4a98f…

MALICIOUS

PDF

62.3 KB Created: 2020-11-06 10:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 30f1801432a477eaa5957a0ed9317384 SHA-1: 7647aa6a4f5a472eff5658cbe7fb8ca91406349c SHA-256: 2ec363b272f4a98fa55ea2f86a8dfed68187f7ea1f52d18fd0e51e4122968023
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, embedding numerous URLs designed to redirect users to potentially malicious sites. The primary malicious URL identified is https://cctraff.ru/123?keyword=teddy+bridgewater+contract+saints, which is flagged as a known malicious redirector. The document's structure and the high number of external links suggest an attempt to distribute malware or phish for information through a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?keyword=teddy+bridgewater+contract+saints In PDF document text
    • https://denibizokitig.weebly.com/uploads/1/3/4/3/134340328/sawib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5f8c0ab229327.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/2de010d282b813.pdfIn PDF document text
    • https://jutebipofan.weebly.com/uploads/1/3/4/3/134334370/tozerodo.pdfIn PDF document text
    • https://xoxujodega.weebly.com/uploads/1/3/4/3/134363828/zoxot.pdfIn PDF document text
    • https://gilasagajeradek.weebly.com/uploads/1/3/4/6/134632792/ef8fca.pdfIn PDF document text
    • https://vifesomojijafi.weebly.com/uploads/1/3/4/3/134337648/jokogip-puxomaje.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/regufojalojaza/oxford_dictionary_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27e8712-1b2a-4810-9fee-366c00dda610/bojaxokamizidotexalufel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6753b296-958c-4e6a-a2df-434d27a02406/lamofobid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b28ce4-8fc7-4e58-92de-c80975ed2229/powamojow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94afb532-804a-4213-8d9f-b4267e10a260/the_house_on_mango_street_journal_guide_chapter_21.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_off0000b122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB122 5356 bytes
SHA-256: 2e108e3553c2aa43a55ea67371b354b7540018020d05fe831748fb8253d2a4ab
font_01_sfnt_off0000c37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37E 11984 bytes
SHA-256: 59935c4483f66054deb7148a0bb71afeea1e0bf660ef1bface5f734253518e19

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