Malicious PDF — malware analysis report

Static analysis result for SHA-256 050101cd5a3e3919…

MALICIOUS

PDF

41.9 KB Created: 2020-11-08 13:35:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b56e6988e541534b2b1b435a734073aa SHA-1: d30042147aa280e235b1723a59e60786bbbeb9c2 SHA-256: 050101cd5a3e391956b0ac8599162e91b10bc151ca61a7244691dddc967ada12
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffmen.ru/aws?keyword=cps+2019+-2020+calendar'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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://traffmen.ru/aws?keyword=cps+2019+-2020+calendar In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8ff4311df35.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/wibedubosateg/breadboard_projects_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/kurtulu_sava_cepheleri.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/physical_geology_and_geomorphology_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/why_we_sing_choir_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/language_handbook_answers_worksheet_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/gauss_seidel_iteration_python_code.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/fetlife_account_share.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/desuwunaziwakerimefoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/online_converter_to_docx.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/modimanorikisanulebazona.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/54285407440.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_off00006556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6556 5484 bytes
SHA-256: f0686bb03957c47766eb680090d7fbff5780becad555bbb03d6a249c14b0dd92
font_01_sfnt_off00007812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7812 10192 bytes
SHA-256: 31304ec49517bd4605591990594f8438660d7dd3aceb057b119425374c98dd1a

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