Malicious PDF — malware analysis report

Static analysis result for SHA-256 227f785606fafe03…

MALICIOUS

PDF

41.6 KB Created: 2020-09-30 13:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7a32b6261d07758d8834306e13fd3c5e SHA-1: 31f9ca5449ac67d4eed0477fbabe1a99c7ae5aa2 SHA-256: 227f785606fafe03643adb1a6f7bcbea305009ffad60d34675ebe1b8a389a712
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary URL `https://cctraff.ru/strik?keyword=catalogo+avon+campagna+8+2019+pdf` identified as a malicious redirector. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates a pattern of using disposable hosting for multiple links, suggesting an attempt to distribute malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious.

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://cctraff.ru/strik?keyword=catalogo+avon+campagna+8+2019+pdf In PDF document text
    • http://files.constructionindustryhelpline.com/uploads/1/3/1/6/131607404/wutabojagek_zifuwopadabi.pdfIn PDF document text
    • http://kafuku.mywonderfulstudents.com/uploads/1/3/2/6/132681647/ab7ba6bca9a.pdfIn PDF document text
    • http://files.aofeathers.com/uploads/1/3/1/3/131398605/sukosagosomuz-rofagidib-nibis.pdfIn PDF document text
    • http://fumusinuf.daniellelchuk.com/uploads/1/3/1/3/131380908/xedet.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/40138594059.pdfIn PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/dubaluxexalujor.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/sejumevoboli.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/nukepefimevatadap.pdfIn PDF document text
    • https://site-1036985.mozfiles.com/files/1036985/461994182.pdfIn PDF document text
    • https://site-1036885.mozfiles.com/files/1036885/dipatunolawesabowagejegog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6933/9808/files/39524846562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6325/1622/files/gomutig.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_off00006084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 5840 bytes
SHA-256: 7e95c9ff82a2a72574548803c4d8a26057264c43e4346b9ce17f0fc2b2b9af87
font_01_sfnt_off00007466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7466 11080 bytes
SHA-256: 7c0369cef4a3ee02c9c61011506d9a815b130d705336255e4a3d70ee8aa7f9dc

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