Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19e0eba60b75256…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 19:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 304ca9d4f2107852a70e6fcd02634d0b SHA-1: 3c9eb8b4d1e0dbb31427b08b05352521a54073ee SHA-256: d19e0eba60b752561ed5094d377a0599f38c1a36abd233e43317835cc82cbd99
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/pify?keyword=nervio+ciatico+tratamiento+pdf'. Another critical heuristic identified a PDF link farm, suggesting the document is designed to host numerous external links, likely for SEO poisoning or to distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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://ttraff.ru/pify?keyword=nervio+ciatico+tratamiento+pdf
    • http://denebozaz.deliveredphotos.com/uploads/1/3/1/0/131070786/gobajinigabeked.pdf
    • http://tugadaxa.nottsu3anetwork.org/uploads/1/3/1/4/131438641/d2b4c0818614c0.pdf
    • http://files.thewwiicampaigner.com/uploads/1/3/1/4/131453907/7b5de.pdf
    • http://files.tamsjets.com/uploads/1/3/1/8/131856134/pixipiposipidopula.pdf
    • http://files.sprucegrovegsasociety.org/uploads/1/3/1/4/131437980/fefufozelatebinebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/65668827843.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/86356658162.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/buwomapaxajeriku.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/45584293379.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4220/files/kevexejebujiwexike.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/adobe_audition_3._0.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/lumumaniza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99203043279.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/centrales_termoelctricas_de_biomasa_libro.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/8304756630.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/what_is_parthenogenesis.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/21761388888.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aef.bin
1177f31b08369534de4e0ab29dbbe7a4cede74fe5793fe9bf22a8ce3d0150b66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEF 5120 bytes
font_01_sfnt_off00007c53.bin
2ad4b713c090997b4892e05fe231818146c67a4abb4177cf2d0670173e51b43d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C53 10872 bytes

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