Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7caf1174d182d5…

MALICIOUS

PDF

31.6 KB Created: 2020-10-30 15:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bfd5f5b969f9b2db4934abc70970b3a SHA-1: 5bf1ff8bf28557c90d61f6b9a87ef9afefafdb1f SHA-256: 2e7caf1174d182d5cf178922e3bbd506e0b76e5caed2db3295502e436ee67730
94 Risk Score

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://ttraff.ru/123?keyword=hunter+x-core+manual'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a harmful site, consistent with 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://ttraff.ru/123?keyword=hunter+x-core+manual
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/vesegitarifumo.pdf
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/juroruvipilesug.pdf
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/6792826.pdf
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/e7c9c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cc67054e-efc8-4563-969d-63cfc1261f22/tratamiento_para_tuberculosis_gpc.pdf
    • https://uploads.strikinglycdn.com/files/743d5609-3bd3-4ee0-9624-ef6d53703ef2/kufuvupimibibenijejoz.pdf
    • https://cdn.shopify.com/s/files/1/0505/2809/2360/files/walopubev.pdf
    • https://cdn.shopify.com/s/files/1/0268/8116/3438/files/best_live_stream_football_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0506/3914/3062/files/lugiluluvetoxorerotinu.pdf
    • https://cdn.shopify.com/s/files/1/0502/8901/7028/files/basic_fluid_mechanics_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/young_justice_wally_west_alive.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004035.bin
197f292f3219473a123389d8529b7fdeeeb1305d03d2d3a5d341b10b89bb7cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4035 4828 bytes
font_01_sfnt_off0000508f.bin
bbb9263ddd25da0f987473310d2860b9e3c6878152a6bbebb0751ed67e1a694b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x508F 9828 bytes

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