Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c36cd6addd5dbb…

MALICIOUS

PDF

40.2 KB Created: 2020-10-30 02:39:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 61c165dc40e78f672576ca38c9e0ae13 SHA-1: 9e87e8e292c6610840e8b51d6091a6176bbe14f9 SHA-256: 39c36cd6addd5dbbbd37ad36bf470031177ed3f52ac0255b214f977176d23f64
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 critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/123?keyword=the+land+of+the+rising+sun+book, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to lure the user to a compromised site, likely for phishing or malware delivery.

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/123?keyword=the+land+of+the+rising+sun+book In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f86ffb994b20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f89f2278e7e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5f967e654d2ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f8867f8cd419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f9b3b6836dca.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://uploads.strikinglycdn.com/files/fce94eb7-a970-4d10-92a4-aedb1b50575e/43762585610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b13c019a-b731-4fc6-b03b-11f24a589acb/81112085338.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/madurez_placentaria_grannum.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/avast_anti_track_premium_activation_code.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/historical_thinking_and_other_unnatural_acts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd2e29c-5a7f-45f0-ade7-1f5b6e37daad/hwf62_filter_lowes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9248661f-356b-459d-b7a4-49a02f99b471/xadefelepalijok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f932ab8-d183-4a66-a735-d6b246cfe828/sutisitemepulun.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/cuantos_son_100_grados_fahrenheit_en_centigrados.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_off00004f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F33 5204 bytes
SHA-256: cb289e3aee9d9824b32de4072f9836f90dd3fafe9f1e7419df39f6549382d895
font_01_sfnt_off000060d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 11200 bytes
SHA-256: 8001f830b92bcbc2c6222e6c4e0a5a6a25226a2d421e895229ac19f88b33d959
font_02_sfnt_off00008577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8577 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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