Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa9270ce94af49e…

MALICIOUS

PDF

47.0 KB Created: 2020-10-18 00:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b97f2da977c93aea4ed496d04ab201e6 SHA-1: 74f35da3462d27a60a4ee9ee38fb9ae6db7dbe69 SHA-256: 7aa9270ce94af49e1df8b2249c8e9377cc704581db9fc4dae23f0bb145a8d9a6
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, including a known malicious redirector at 'ggtraff.ru'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that this URL is associated with malicious activity. The presence of many PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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=useful+classroom+expressions+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f8b5bf419d22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87bfd1b7d65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5f8abe0757a8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f879fbf88feb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f87bad098485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f87085758022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f890390dd83d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f893d10835cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f888871ea03d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f89d7ff05772.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/1/0498/9331/0631/files/3934721782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5221/1620/files/gepivenujubegulogud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/62010935748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7480/5148/files/neguzexidawofaninajimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0368/5275/files/2.2.2.5_lab_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1756/7895/files/isaac_asimov_guide_to_the_bible_audible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2364/8928/files/california_pmk_deposition_objections.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8979/8317/files/6245553816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6320/9884/files/oclusion_intestinal_tratamiento_nutricional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4698/4616/files/first_class_with_distinction_gpa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/how_to_upload_image_using_retrofit_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7647/7632/files/barretts_esophagus_guidelines_2020.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_off00007938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7938 5360 bytes
SHA-256: 7aac0e48e1ead601b1adad9440e77fcdc57f8026293b0eafd7d9db779a9ed76c
font_01_sfnt_off00008b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5C 10288 bytes
SHA-256: 14059220927305b665779f5f6ea85d14418988f9bfedc49085ebad056abb7a83

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