Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d91fe70aa47e76f…

MALICIOUS

PDF

44.1 KB Created: 2020-10-28 15:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f9758b1aa7c3e91b9fe972e43ce58ddc SHA-1: 1cae9a496eb094dd803e36df8b162fed9f20a90f SHA-256: 0d91fe70aa47e76fa0a1315d9f44b61e5fda6e2996c42e7f5c1ccd076b946682
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary URL identified, 'https://ggtraff.ru/123?keyword=federal+constitution+study+guide', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a phishing or redirection attempt.

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://ggtraff.ru/123?keyword=federal+constitution+study+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f8b84991ef94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384045/normal_5f8c015dce849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f92ac60bd404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f8c8415ac95d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f8dc82071b6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_5f9654069f9c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f8df89720458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f993e98745c9.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/1/0435/9271/2349/files/fastest_youtube_downloader_for_android_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59371ce1-189a-4b07-b871-093451b8b6b3/daxubojudizigeluka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a48c894-8f40-4fc9-a120-e1354a88b927/spalding_portable_backboard_system_54.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0503/0812/files/su_binary_apk_for_supersu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2162/2184/files/65590314674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9dfef4c-82f7-45d9-95ab-497aeffb0836/27671908423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002891b8-0838-461b-bcec-a0a29751c775/james_preston_rogers_altura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/995614126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/convert_docx_to_java_apache_poi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/41224519281.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/mevuwuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1882/5123/files/11257867279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b754bf-0ea5-4cd0-9ecc-a9581dc59e0b/69836234683.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_off00006b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B73 5164 bytes
SHA-256: 68c564a09ee30469a6be2b06c0bea66bd6894de0356bd13b83128cfe1531e4f0
font_01_sfnt_off00007d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1C 11220 bytes
SHA-256: 84c1d3570f00d2eb500827908df54f3103f5691d72c3cf3a4b2e397ea205e4da

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