Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66047f340063931…

MALICIOUS

PDF

57.2 KB Created: 2020-10-16 12:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3fada61ed7283bba27024cc843683743 SHA-1: 0cfbeb9c7b7cc8d310b8032e0df1469324d94742 SHA-256: e66047f340063931d5546742020b18e1d8ac17152c060585bafef2079230abdb
184 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which contains a large number of external links. One of these links, https://cctraff.ru/wb?keyword=the%20wright%20stuff%20honey, is flagged as a known malicious redirector. The document body contains obfuscated text and embedded URLs, suggesting an attempt to lure users to malicious sites. The presence of numerous links, many hosted on disposable or link-farm-like infrastructure, indicates a campaign to distribute malicious content or phishing lures.

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/wb?keyword=the%20wright%20stuff%20honey In PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/3414435.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/tenuviwij.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/5815946.pdfIn PDF document text
    • https://fumadutukit.weebly.com/uploads/1/3/1/4/131437402/lifipeti_mirudoxok_nubosakizonolo_tenigab.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/8217003.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.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/0a706d44-37f2-49db-9494-7678b5d0d286/32090953331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f80a36-42c3-4ec5-8a6a-789bfb31e40a/xasafijikobivowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db31380-8add-43b5-a3df-3ce4ac89fb3b/bugulajakugafulabeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd9c1fa-12cf-47b1-8c27-a7a7837c2a75/919962183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03ea9f7-dfab-40fd-bd84-e9a293d08e31/vagune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/974c7e48-e770-4952-8719-90e55e8ce2d7/tojasifujuguwimavada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246ad7dc-47eb-42b0-95df-71156ef2b1b4/75795810785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/861768e9-c6ee-424c-9f13-c62e98c02ade/timomolalaziwimaludos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130629b9-7aed-46a2-9d74-0fc5da2a0191/fakitumiberapuzilubuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07c11f3-e4da-462b-851f-872590813cc1/7175185469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ea2e1a-b4ee-4332-b83d-289b72719191/69934792591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbb0248-bb17-4ea0-a339-4bedf9e6ce04/tufesofozalorawef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772ed879-755e-4d89-b846-ac5b580f596a/46210987536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867865c8-4c1f-420d-ad0a-e62347ceb011/kutulipaloxamexatafe.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_off000096b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B5 4928 bytes
SHA-256: c62e39d6e337429d0735eb2b71d2ed54b7d55560231c7bd0c5c6671c17b41733
font_01_sfnt_off0000a79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA79A 15316 bytes
SHA-256: 5169f355e8882e6b55892b99097dd7b0b56c185197b042eeec50259d9c950b57