Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1679dfb27a7140f…

MALICIOUS

PDF

39.2 KB Created: 2020-11-01 10:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c3c996f276ef759847325092ce627474 SHA-1: 51e5bb0f56d3a2c0bdb6246f3e061aca13f9b7c7 SHA-256: b1679dfb27a7140f2316323fc2c98d63dd64fa18b06c1dffe1493e1501762e77
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lure users to malicious websites. The document body text, though partially corrupted, includes the URL and a keyword related to financial information, suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/123?keyword=what+is+mortgage+payable+on+a+balance+sheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419433/normal_5f98ae7c04d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f9c6725d1579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8754d245b09.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/dumupa/zemakut.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/aparato_reproductor_masculino_partes_y_funciones.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/ableton_live_lite_9_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/proloquo2go_core_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf2f18b-060c-47b9-af8a-b6df4d6f198c/83014186535.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/oracion_a_la_bandera_salvadorea_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9e001a-6a80-4cf6-9aee-f588e617c79d/35689915389.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/74324863248.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/13879678918.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_off00005987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5987 5600 bytes
SHA-256: 29d68df91e44d4b7f9f67cced674cb93a65fb6baec4079e3a4f20306c7f8fc0b
font_01_sfnt_off00006c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7D 10504 bytes
SHA-256: 05de05e5c1ed6f702bc5bd6c8b3eeabef5dd9c0a02c20282d001fb96f211d2ad

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