Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae4485d074a746e…

MALICIOUS

PDF

41.6 KB Created: 2020-10-28 14:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a0aeb4326212888547cb3f943f36e8a6 SHA-1: 6cd24f810668626a02a5647bb35a7c798f2a613e SHA-256: 0ae4485d074a746eb3b3782eccb81963450aadb16548c68462e176cc0e7f6b1d
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely intended to lure the user into clicking it, leading to a phishing page or malware download.

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=the+martian+google+drive In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411701/normal_5f93f01e701d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f99060c527b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_5f96117f5ada6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_5f943334a85cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387715/normal_5f94adb7bb7c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f87089b227d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f8a50da07cc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5f912de367076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f8750476125b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_5f9450c585310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f87ef14dd41c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f8c7cd7de11f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f91b9ecd8ed4.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/wilugugo/french_english_bilingual_books.pdfIn PDF document text
    • https://s3.amazonaws.com/gonuxiwela/87754587557.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/descargar_biblia_de_estudio_esquematizada_reina_valera_1960.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/arduino_super_starter_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/45321651207.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_off00006507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6507 5072 bytes
SHA-256: 9f3cae5588d8d44379059ba2bba8105b8098cc67b70768798367774781f81e60
font_01_sfnt_off0000761a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761A 10416 bytes
SHA-256: 59a6daefe74acf1a02887286bf5712f5ba4b634ad703a14db2cb2f8fde0446fd

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