Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e09970d74620d47…

MALICIOUS

PDF

60.5 KB Created: 2020-10-29 23:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3243a6d2c5b7bea94dd69136fe8f2aff SHA-1: 2dca06d03e8e2f43071bdd8015985052cde45c05 SHA-256: 4e09970d74620d47a40e8393af16a0524393852b7eb6bd2f8afbeb47de8242e5
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=northern+shaolin+kung+fu+near+me'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL indicates a likely phishing or malware distribution attempt.

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=northern+shaolin+kung+fu+near+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f94c1160d99e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5f93497b8aa33.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/vowetapikopugumeve.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/f568c777.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/1614702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f9a683c5e360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423757/normal_5f9ac42bacdc9.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/risisipajole/4k_video_downloader_license_key.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/free_download_rapidex_spoken_english_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/bestiario_2_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/sap_basis_monitoring_tcodes.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/zilew.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_off0000a1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F5 3448 bytes
SHA-256: ab455c59ae3a6d7cff91598dffafec3ff92f45452ae76a7c8d46de428662e805
font_01_sfnt_off0000ae56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE56 5212 bytes
SHA-256: 1c1ec1b06d36b7f67f3020974b0aae06698ebdf5747741d3c2c870afeecfc894
font_02_sfnt_off0000bfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEF 10880 bytes
SHA-256: 0cd6aa72fc31fd829111b1418fe4176228d6526858cbaadcd5575b839bf8ab29

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