Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e523232f7577fd…

MALICIOUS

PDF

44.7 KB Created: 2020-11-05 09:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0f92dd87bc0802aca4b5084de1fad74c SHA-1: 1e3238024bbd76bc042b780564e475a28dd60f69 SHA-256: a4e523232f7577fd8bc01ea7e132291b068620287c44faa8011652a7946a5271
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and text that mimic a lesson plan, designed to trick the user into clicking a link. The primary URL, 'https://ttraff.com/123?keyword=the+things+they+carried+lesson+plans+unit+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is 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://ttraff.com/123?keyword=the+things+they+carried+lesson+plans+unit+pdf In PDF document text
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/df805ba500.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/zutilipevozafeguwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382784/normal_5f9631a2ed179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5f8d9fd0c44da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_5f9ae3ce247ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8711e307b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8c7ea8e5b9e.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/tetinisakusodosefaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_5f9be9026b97e.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://s3.amazonaws.com/megodipewukitoj/words_starting_with_snake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6562dc-fe41-4364-8880-9321a9072b52/klipsch_the_one_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3c35df-c1a7-450c-a566-ba8d320ff9ac/94043217772.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 5352 bytes
SHA-256: 75d1e42455ce012ac9ad1a79207cad4850a71fa2e3f749d0b9c1efaf90bde573
font_01_sfnt_off000074a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 10236 bytes
SHA-256: 6f3b32ca458c0db00081e87aca78e79500b512ed98580efadba37fb788441cc3
font_02_sfnt_off00009763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9763 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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