Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d09c49c9ca78c5…

MALICIOUS

PDF

46.0 KB Created: 2020-10-29 08:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 11c4a68b7784c21505d3de2643383868 SHA-1: 1d376602808d5b40e4d1f1093a65ecec803a74e3 SHA-256: d0d09c49c9ca78c55516604550ff63a2b9d761022f6b50a4d8828df609016d97
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially garbled, contains the suspicious URL, suggesting an attempt to direct users to malicious infrastructure for phishing or malware delivery.

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.link/123?keyword=jeff+payne+salt+lake+city In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f876677dd9bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f8897fce4f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f8d1e9467117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409409/normal_5f96452ad0fd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5f8ef7aa6eba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f87f43d56abd.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/naramuro/detofa.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/ararib_plus_histria_6_ano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4676/5222/files/android_vidmate_old_version_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/zewozosazijemegekave.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/multivariate_statistical_methods_morrison_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/tilufu.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/types_of_animals_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/chhattisgarh_river_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/jibovepogolidinunoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3754/4607/files/whirlpool_heladera_no_frost_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/11038749351.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_off0000741d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741D 5068 bytes
SHA-256: 2f2d5d14665ad98c09ccccf73fdafbb364b211b06769f390422406b02280da1b
font_01_sfnt_off0000858a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858A 11248 bytes
SHA-256: e1522dff50f228363d6409efad86a29abdd00926b0cc7d4d35a670395db7e5ea

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