Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c195157502af34…

MALICIOUS

PDF

42.5 KB Created: 2020-10-26 17:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ad22e351129c8e1453c13d9979e7598a SHA-1: d69a8a32ab4cfc4417a82c0bfdf0db9544069474 SHA-256: 20c195157502af345db6879de8123f3a8e69f804aab05beaf7341e693c77cb82
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ggtraff.ru/aws?keyword=abdominal+aortic+aneurysm+pathophysiology+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious content under the guise of academic material.

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/aws?keyword=abdominal+aortic+aneurysm+pathophysiology+pdf In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/8b54d5197.pdfIn PDF document text
    • https://gelekale.weebly.com/uploads/1/3/4/2/134266195/menizovumopulu.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/tadovu/74209056670.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/zudawabatoralar.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/41417601269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f069db76-3d25-4811-97a6-57644bbb1656/pezikokukuvuvibumid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a5be13-e3d9-4955-8642-60f7f4cea562/64694210968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a6544d-a417-4ef2-a45a-841d13281ea9/36858464569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bb1fde-fb39-4a38-907d-c072495379ce/18653377585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a43b5bf-7c25-4ecd-afdb-6c09006967d7/bogepotigujutobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7713/0658/files/cpt_manual_professional_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7837/8157/files/45038169120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8086/7736/files/lambs_and_ivy_mobile_assembly_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8489/9238/files/ffxi_drg_guide_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/31776882177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/der_feinschmecker_weinguide_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7732/9586/files/serotonina_libro_houellebecq.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3296/files/oops_concept_in_java_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4551/6977/files/ndp_costed_platform.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5502/6854/files/57852935846.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_off00006611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6611 5800 bytes
SHA-256: 9cfe23fc3071fe0a91faac0dd2b17224ea049ad4679c716f9ad601bc741e4711
font_01_sfnt_off000079a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A6 10208 bytes
SHA-256: 598075aa8a652df44126163593b9e1f92c3be9fc5add220bcf23165ff61f8969

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