Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de411a6298e428f…

MALICIOUS

PDF

52.9 KB Created: 2020-10-09 03:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9ea090726b972aaa8e074fabdcf0b44a SHA-1: 152e45aa2976d2daff38ee83b21fdb5807ab04fe SHA-256: 6de411a6298e428fd69273961483b9901f77770b872763d6d214a73aa22d7c40
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious due to its function as a link farm, containing numerous links to external PDF files. One critical heuristic indicates a link to known malicious redirector infrastructure, specifically 'https://ttraff.club/pify?keyword=jeunesse+global+product+reviews'. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on disposable domains, suggesting an attempt at SEO manipulation or distribution of further malicious content.

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://ttraff.club/pify?keyword=jeunesse+global+product+reviews In PDF document text
    • http://pemezava.mychicagotailor.com/uploads/1/3/2/6/132696323/fotegipa.pdfIn PDF document text
    • http://files.yorkshirecajun.com/uploads/1/3/2/3/132303229/guzobubag.pdfIn PDF document text
    • http://files.readwritebake.com/uploads/1/3/1/3/131380895/bejajifel.pdfIn PDF document text
    • http://files.makingwhatiwant.com/uploads/1/3/0/8/130813314/nabiluwigowavub_mesedaromodapuz.pdfIn PDF document text
    • http://bomodado.trescare.com/uploads/1/3/1/8/131857204/1187696.pdfIn PDF document text
    • http://vijukixe.alinjarralabradors.com.au/uploads/1/3/2/7/132712207/5721175.pdfIn PDF document text
    • http://files.mikearmstrongcomedy.com/uploads/1/3/1/4/131437139/jakuku.pdfIn PDF document text
    • http://files.nggabooster.org/uploads/1/3/1/3/131379875/pakudoni.pdfIn PDF document text
    • https://site-1039315.mozfiles.com/files/1039315/31717734741.pdfIn PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/61225963653.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/8ff81013-100f-4c89-9688-3f60ca88dd09/53797600448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c019468c-9570-4efb-b80a-dbe63401b10b/nasaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5ddbe6-645c-4e2f-9afa-37ac345ecd3a/xitipojosukedapaxoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1ef012-64a4-4c17-9c54-d39d5903b934/1730112547.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_off00008e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6E 5520 bytes
SHA-256: 3004677f1cf95f7816d915bc8c94e22c927d93c29359a95e645f829715dcc372
font_01_sfnt_off0000a150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA150 11064 bytes
SHA-256: b750550500fb058ce96f4ce6202bba49609ef845214046648f594ba929f05a11

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