Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b25a98c1e2dac2c…

MALICIOUS

PDF

43.4 KB Created: 2020-11-04 02:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d81e1767b8b21ae47a5212e6e8cbb2cc SHA-1: 616d030aec8ef003df952fc3957ca119dce6d7c3 SHA-256: 9b25a98c1e2dac2ca1c70fba03107d2d87a484a25c9148049c1fbf4ebca9a59a
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 critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?keyword=free+rpg+maker+mv+assets'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, indicating an attempt to lure the user to a potentially harmful site.

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=free+rpg+maker+mv+assets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f9d42eee2633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5f9dc44571c3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8713f94755a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_5f902c9f45cfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f874ba83200c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5f8a4fdc66036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f936cdcb90cb.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/c0e4fd68-d17a-4238-821c-60abf5be0fd9/fusogizirapiludelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6da1cc3-08d5-40a2-be29-5748f460f2d3/fesidine.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/old_maps_of_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebea144e-1fac-40b7-9c86-7d765f61cc39/99895506041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d4ee3b-854b-4512-8f08-c6e17c1f594f/61357440683.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/adobe_acrobat_dc_reader_free_download.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_off00005dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCB 4708 bytes
SHA-256: fe163b8f607c86a90fba35091e16804c6281af04cd07f7a85b7b89d7ac4ff4cd
font_01_sfnt_off00006dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD2 11072 bytes
SHA-256: 45dab75c78a68d5d30abf4dfc02d6c9c840b85185e2ee172a1f0c253a6c9dc42
font_02_sfnt_off0000930e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x930E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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