Malicious PDF — malware analysis report

Static analysis result for SHA-256 6def729382eb133b…

MALICIOUS

PDF

59.4 KB Created: 2020-09-30 14:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5c0f9702276bb5f6ed29f9514d8ab541 SHA-1: b5bbef8ae2e07c9b21206418f14ed43336bf94a8 SHA-256: 6def729382eb133bbe34280bc3faaa4fc019d6e46827a2db2514ad9b78f10dc1
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to a URL that appears to be part of a phishing or malware distribution scheme. The embedded URL in the document body, 'https://cctraff.ru/strik?keyword=blancanieves+cuento+de+los+hermanos+grimm+pdf', is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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://cctraff.ru/strik?keyword=blancanieves+cuento+de+los+hermanos+grimm+pdf In PDF document text
    • https://site-1036759.mozfiles.com/files/1036759/fosalamanilinitiwozogekus.pdfIn PDF document text
    • http://files.thestandardcanvas.com/uploads/1/3/0/7/130775986/limelir.pdfIn PDF document text
    • http://files.goodarch2us.com/uploads/1/3/0/7/130775196/kaxakavupoli.pdfIn PDF document text
    • http://denajiku.squirrelspreschool.com/uploads/1/3/2/8/132816066/e6cd96d768b60.pdfIn PDF document text
    • http://woxutam.sandsippas.com/uploads/1/3/1/1/131164250/zerel.pdfIn PDF document text
    • http://setogej.michellestanger.com/uploads/1/3/0/8/130813325/5327620.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9016e6-88cb-4cee-b5f4-3ccd2c4dbd46/tanivawixunifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26e46c6-85d6-4b3f-a1f2-d9d9db4e5406/rovevazipukibura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ea9f6b-066d-4e65-a8a9-83cbc48cdc60/44869851830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34899a47-bb0a-4442-aab1-87c831fe1e42/xonofunigukelanajejewexip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b73c3f-0253-41d3-89c9-02068caa914f/jogemodewitapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed70a5a-1855-4f1e-8fbb-00ca60b9250f/jufidadorunijizulesola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e10b376-4553-420b-81ea-422f2e6ebf7e/27125016355.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_off0000a632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA632 5680 bytes
SHA-256: 61347c25af399c363a91e112fe3cc3d2708802eabc55ff5cfe37c501d3af7cdb
font_01_sfnt_off0000b960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB960 11428 bytes
SHA-256: 8489de9548882c15681835469506fdf2e3eba6c2ee9b3871b79a17c8850f7b3c

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