Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf66ea113a338f8c…

MALICIOUS

PDF

43.4 KB Created: 2020-11-04 03:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3fb60823fcc24d00c4c0d2d4bdf4b307 SHA-1: d67487e2b1a8fd543d7a6fe6914bbfaa1aa59f95 SHA-256: bf66ea113a338f8c332f2814ce9a32dbb5d6707eea46ffaa2eaa62a32011ac36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, many of which point to potentially malicious redirectors or link farms. The primary link directs users to 'gettraff.ru' with a search query, suggesting a tactic to generate traffic or lead users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm.

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 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.
  • 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://gettraff.ru/strik?keyword=airbus+a319+seating+chart+spirit+airlines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_5f920384437eb.pdfIn PDF document text
    • https://zuxubemusaf.weebly.com/uploads/1/3/1/4/131453996/pazujamiduratov-viwim.pdfIn PDF document text
    • https://pukaxonimuno.weebly.com/uploads/1/3/4/4/134435323/sesesemedifu-widamada-vonosoxufetisej-miferoxalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8c5bb69a3a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f954b4c18e07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f916fee21004.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/bezutu/wugekoninekero.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/lozakuzigapogukatijagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6222/8658/files/wunudozovasid.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/44908508992.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/82991647538.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_off0000698c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698C 5696 bytes
SHA-256: 3171cc6aa2bb57e7f211dcbd2056c649934952f05cfb2fc2ac034bb2b188d9c8
font_01_sfnt_off00007cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEC 10452 bytes
SHA-256: e3ce5e0643317ee6c8e6b1273ea8d828d1ba82cfcd9e88b7ba58f7dbbbdb296e

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