Malicious PDF — malware analysis report

Static analysis result for SHA-256 2341a172be3d9fb2…

MALICIOUS

PDF

44.2 KB Created: 2020-10-25 17:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f4f82fbd2aa791f58f2aed1818c06172 SHA-1: b60f384104b6ed21a1b4dd203e88db80b00d837c SHA-256: 2341a172be3d9fb251323f72ed781bb79b7a7b403cdac2088f22ecb939310645
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is likely used to distribute SEO spam or phishing content. The heuristic PDF_SEO_LINK_FARM indicates a large number of outbound links, further supporting the SEO spam or malicious redirection hypothesis. The ML classifier also 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 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/wb?keyword=macroeconomic%20environment%20of%20business%20pdf In PDF document text
    • https://kagadema.weebly.com/uploads/1/3/4/4/134456650/3098864.pdfIn PDF document text
    • https://rokolumer.weebly.com/uploads/1/3/0/9/130969153/4e01156.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/burefokewiruxar-sominaguwe-penapekulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ab43d3-64e1-4921-949a-a4c3741537d6/68024571870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8477c197-fcfc-4019-b545-74b9b5574070/pefelawam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3eef73-65ea-4afc-9b62-788166f73581/9527860952.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/wilekewojatupib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9b3356-ca81-4201-b26d-b5f664eee024/83967198932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41716d80-86cc-43d7-872b-b656bbc3afb2/62613096644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac01c27-9fcd-45bf-af0f-1e9bf0a00bfe/goffman_la_presentacin_de_la_persona_en_la_vida_cotidiana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/figurative_language_unit_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2899/1130/files/6662255818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2348/2530/files/81588196377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/huawei_theme_font_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1219/4457/files/89284940713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0075/6931/files/11960287337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7910/2378/files/15325372241.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_off00006ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF3 5476 bytes
SHA-256: 23cda0821c85f79c8cbeddef1fc2062f1c7c8bba1b93f7295b90c40770a5f64e
font_01_sfnt_off0000817a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817A 10160 bytes
SHA-256: 9154bb22823f811e2693084fb42a9ffb841e7e53265c7a5a6fa0bf36a73dfee4

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