Malicious PDF — malware analysis report

Static analysis result for SHA-256 b453ef9b365478ec…

MALICIOUS

PDF

43.4 KB Created: 2020-10-25 12:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9d5437a51b7fd629689c44401e387283 SHA-1: efed6cb1a5aa82a58071c23601bc5efd95b13eda SHA-256: b453ef9b365478ecb283295932be1e81b4e4a97267d5a54e28f7c0db463221dd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://cctraff.ru/strik?keyword=perry+stone+new+study+bible. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links to other PDF documents, some of which are hosted on S3 buckets. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting an attempt to manipulate search engine results or direct users to malicious content. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a malicious intent to lead the user to harmful content.

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://cctraff.ru/strik?keyword=perry+stone+new+study+bible In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f93d74a9ffec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_5f93acf28a932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5f8d60f623703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f89adb29453b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f8b7d02f0370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f88ad4552d1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f8ee5c2ea0bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5f9238ecbd0b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413838/normal_5f94a941dcc38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f910ef9c2e75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f881e8626456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f888b03b3e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f92c4db722e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_5f89bae765d0a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/metubevozisul/julafanufa.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/actos_de_comercio.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/nukawugovuwiwufuwineweped.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/aiims_recruitment_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/fejoburoxizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6428/2267/files/ninesorezuporirapasufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3092/8286/files/56942002522.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA4 4828 bytes
SHA-256: 42782b80b0c57fc1e35aa555e4ae15a22f4bccd22d4425545d611a216b74a3ba
font_01_sfnt_off00006f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 10188 bytes
SHA-256: 102980043370ae30437947d85c3438000012535f11c411fb7cb3da537b3c5386
font_02_sfnt_off0000922f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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