Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cd196b162c4b49…

MALICIOUS

PDF

38.9 KB Created: 2020-10-25 18:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3a963db1e4a6b1f9a09865dca2861303 SHA-1: 7459f03d059eb1d080a8f762b5686ca80c614cf8 SHA-256: f5cd196b162c4b49b990f5680ee44ad0a47c9d71fe23530eb42ec80bbf1435c6
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?keyword=ravenfield+beta+6+free'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ravenfield+beta+6+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_5f91f1904f4ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f883adaabc7c.pdfIn PDF document text
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/zibilasorebaxiwodu.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/gerilulivomek.pdfIn PDF document text
    • https://jaxuwigoba.weebly.com/uploads/1/3/4/2/134266140/21f56645.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/limewub/resume_builder_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/jewudedo.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/81044771129.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/english_b1_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bebubozoletepoviwesitem.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/lepebatadulobem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2179/3942/files/ragibuturadibowini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/0645/7518/files/fupaliduzukaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9256/8983/files/nccn_guidelines_endometrial_cancer_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8294/3131/files/my_new_gender_workbook_download_free.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_off00005a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A44 5084 bytes
SHA-256: c64cdf475a16709e2f9932475134922fee380c4d783ffb8ecfe9d477b113a4f2
font_01_sfnt_off00006ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA6 10460 bytes
SHA-256: 64fb235df6f90fcf69c43337e850d6c88ea251863b63698c615e891322a28622

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