Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a79b5286f7e2ba…

MALICIOUS

PDF

41.3 KB Created: 2020-10-26 11:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: be3c11f5bb0377088f5388b65610350b SHA-1: 407cf6019b9fabccaf2f84885084e29517573d7e SHA-256: 44a79b5286f7e2ba996db8b8b5cf8147cce79eed0f995768b3bc753d9ccde080
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for a malicious redirector link and a social engineering lure to install a browser extension or update. The embedded URL 'https://ttraff.ru/123?keyword=online+foxit+pdf+editor+free' is identified as a known malicious redirector. This suggests the document is designed to trick users into visiting a malicious site, likely for credential theft or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.ru/123?keyword=online+foxit+pdf+editor+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f93c518bf581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f873934ad017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5f962e63b551f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f8a21877627c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f86fc09059f9.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/henghuili-files/shack_hartmann_wavefront_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/reduturuwudakuv.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gipesonefipaxelat.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/tarawalekexikisevekabuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a3fcd0-04ec-46f1-a701-415af688f415/zuzujunafagorag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca822d8-890c-4419-b947-63fbb413a4ce/97568570926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8460/2262/files/kabewetazigofopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8695/4139/files/zegiwafaguke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/9626/6694/files/pekozewoxutamemupoxaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8498/1444/files/maudsley_prescribing_guidelines_13th_edition_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1275/8963/files/fallout_tale_of_two_wastelands_alternate_start.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_off00005928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5928 4532 bytes
SHA-256: d54420b04231b7ed3c9d7db7c4c6741e01b292823c024ee93b76297689f0606a
font_01_sfnt_off0000689e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689E 9724 bytes
SHA-256: f0a03f19b7bdce1a8572cd0ad5752887a111418c7e79bc533b1150f050a9def6
font_02_sfnt_off000089de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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