Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a55f700a58ae93…

MALICIOUS

PDF

39.3 KB Created: 2020-11-01 21:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ac795eab325301ed390f7d71feb83ad SHA-1: d69ccc1d9095825064f37eef9739145b54d28719 SHA-256: 63a55f700a58ae939caf62b3043cafec3294a1ec4f96640616d7a092eebe9348
94 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?keyword=fotona+4d+face'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to URLs, reinforcing the likelihood of a redirection-based attack. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

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://ggtraff.ru/123?keyword=fotona+4d+face
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f8ba2de73dff.pdf
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f986c988372a.pdf
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f915784dc9f6.pdf
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/1644552.pdf
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f8ded330a613.pdf
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f9e6ca81ced5.pdf
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5f92a03650e14.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/868abdd6-6965-4079-b1a1-15f21f53064d/23095796014.pdf
    • https://cdn.shopify.com/s/files/1/0485/0194/8577/files/funinafudosoliluj.pdf
    • https://cdn.shopify.com/s/files/1/0500/0940/7638/files/24056165252.pdf
    • https://cdn.shopify.com/s/files/1/0441/4462/3768/files/96813023180.pdf
    • https://uploads.strikinglycdn.com/files/eb48b14f-e299-4063-bd0f-2c6ae7f52424/fagelelirilirog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/sotoganev.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_off00005e17.bin
43c1edae407b83abe37be847be85f8f8d0f81bcc39a581e372ea2874f86a2f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E17 4752 bytes
font_01_sfnt_off00006e67.bin
fab604d65150d25ad951da5d58c70c19384c6f10ba87550a9534e7ff0936a31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E67 10088 bytes

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