Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a2773b34f2a9d5…

MALICIOUS

PDF

39.0 KB Created: 2020-11-05 05:03:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e3f2767ba3d16941783c925fb8028770 SHA-1: d739f1bd87c834a5f2c8dc6a9e9cdd72476b9224 SHA-256: 13a2773b34f2a9d599ea2054d0b5460e2bee1a070274be12b43ec404d1c613a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and contains a significant number of embedded links, indicating a potential link farm or redirection scheme. One of the embedded URLs, https://ggtraff.ru/123?keyword=hillside+club+berkeley, is known to be associated with malicious redirector infrastructure. The document's structure and numerous external links suggest it is designed to manipulate search engine results or lead users to malicious sites.

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=hillside+club+berkeley In PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/supuleduvapujimivaxi.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/bazenumi.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/nururu_vokuxa_sazikovifojo_zujuparikiteras.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/76f37783-c5db-4406-90d9-03ca8bcd9514/99175092347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf9b8a08-b27a-4227-bf6b-a4fd2c5feccb/67316299989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb3744cc-1ee5-454a-92e8-88c245168acc/bitugabedulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20796c31-7902-451c-bbad-7c5a717a6502/81467969708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1faa02c0-f717-442f-9aec-f032bd9cee06/munubizeritinuziva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4eedc7-6982-45a6-a2d1-9f7a3eda09fa/fozetizewemamopezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77510c47-1e90-49ae-b935-04434aad512e/86017014132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e83452f-60aa-4f1a-b1c7-415d29afb35c/40926384514.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_off0000598a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x598A 4992 bytes
SHA-256: 213cc81f99cace8ce0455ec06b0a1db137b199fc9b82b8c4acbdcbc02bb0a3e0
font_01_sfnt_off00006a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 11116 bytes
SHA-256: a09f7f5bfb825d17ece1daaccb307f1a9890ddcf9740afc35b4559216208abf2

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