Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b318306bf0c8081…

MALICIOUS

PDF

38.2 KB Created: 2020-11-01 00:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 97b7c89d8dda813c9905272606489764 SHA-1: 181c987554ad98519688e4bff7e8ac9cdaef2a1b SHA-256: 8b318306bf0c8081ab1af962c4b10c2c4ebfd2efcbc4941b21414b50330f5040
94 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The embedded URL `https://gettraff.ru/aws?keyword=nanda+2018-2020+pdf` is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to redirect the user to a malicious site, likely as part of a phishing or malware distribution campaign.

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://gettraff.ru/aws?keyword=nanda+2018-2020+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5f995eec8e0af.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/rifedabaxizilik.pdfIn PDF document text
    • https://subulutug.weebly.com/uploads/1/3/4/3/134349811/sokasasipiraten-venux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f8890f5d9956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f95878067ca3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3954/2424/files/81598908502.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/estudio_quia_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/effective_communication_in_the_workplace.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/1234511107.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/like_a_prayer_lyrics_madonna.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/two_brothers_by_leo_tolstoy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8A 4680 bytes
SHA-256: 0b20c5711a61500535750bd7fe03e0d63a428501f0c6c6c01b8a24579238a055
font_01_sfnt_off00005b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B76 10256 bytes
SHA-256: d2f778f91ce3a1db0c3d2cb57495ad6c79255b198b823b4e6439cda09a32d3d2
font_02_sfnt_off00007e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E75 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230