Malicious PDF — malware analysis report

Static analysis result for SHA-256 0942feb754a27818…

MALICIOUS

PDF

43.2 KB Created: 2020-10-01 16:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6b7a1e04e103e8d9f7ee358affa9bd3f SHA-1: 2c40ff3349cf1f8fd0544db2414c56c52cf75733 SHA-256: 0942feb754a278187f960629c81dc617cd1150aed7571805b92f781ec66f8253
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting and redirector infrastructure. The primary malicious URL identified is https://cctraff.ru/strik?keyword=acetazolamida+mal+de+altura+pdf, which is flagged as a malicious redirector. The document's structure and link farm behavior suggest it is designed to funnel users to malicious sites, likely for phishing or malware distribution.

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/strik?keyword=acetazolamida+mal+de+altura+pdf In PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/tizovogonovinuzopup.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/17318726041.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/99872837027.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/36385377960.pdfIn PDF document text
    • http://files.portposhwash.com/uploads/1/3/0/7/130739654/5c6a7d73c0032.pdfIn PDF document text
    • http://files.dragonfiresafety.co.uk/uploads/1/3/1/0/131070230/dovivaxirajaboju.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/20afc2a1-38a3-47bf-8f04-1d5e457faba5/sajuxejegirefokawesudef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9175f9-eda1-433b-b5f1-1c289872b9b2/nomoripokoriz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb695deb-9d8b-4632-87c4-cd88be5c36a7/91344688869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20fc46ff-0b9a-47b3-966c-3d1ca7d390a6/24889892337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8803/9073/files/6mm_creedmoor_load_data_with_reloader_26.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_off000068fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FA 5160 bytes
SHA-256: beec3e4b55ee2e2f7c221743a8d7827c351223b230bc81cb747041d70bc2373a
font_01_sfnt_off00007a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7C 11476 bytes
SHA-256: 118d17cae0938d2e17a908e17a2720ad3af764fafe44e0ccdfa7116759671141

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