Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afc54cfed157eee…

MALICIOUS

PDF

77.7 KB Created: 2020-10-31 03:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 423bb52709278f33aaa39245983ab62e SHA-1: c85097f126aba4be8ff97dfbeec89b4526f7636b SHA-256: 2afc54cfed157eee21bc20e0731ada16c366a95842177faafc02a6714b6be9fb
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=la+verdadera+historia+de+hello+kitty+en+letra'. It also exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://s3.amazonaws.com/fasanag/notox.pdf'. The ML classifier strongly indicates maliciousness, suggesting the document's primary purpose is to redirect users to potentially harmful content.

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://gettraff.ru/aws?keyword=la+verdadera+historia+de+hello+kitty+en+letra In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_5f989baa23aec.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/bizulexeru-balasibolujamu-loketivajotalo.pdfIn PDF document text
    • https://morekifozolil.weebly.com/uploads/1/3/4/3/134332894/bejiwuju_natisowavoluzum_telonuma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5f90992848f10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f9c97b8ad8ae.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/fasanag/notox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2585/6198/files/43696225294.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/68988227581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc0716b0-0221-4750-a76e-6248a2d6c36c/68343858324.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/7986005082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9938727a-9dcc-4446-92ef-23aa6c6d6434/rizuvifuwumixepiridodi.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/cancer_de_pulmon_signos_y_sintomas.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/ceticismo_filosofico.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_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 5080 bytes
SHA-256: 92d3808eff2f1d80b7cc985b3f12578023810595117e63d9509ef12ec4a67abf
font_01_sfnt_off000100c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C0 12784 bytes
SHA-256: 9f8edcc9638fdf92982a098b1aa7dda97e7dda669ecb97b275f7fad9db24c8cf

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