Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abd5a0c8eea76d3…

MALICIOUS

PDF

41.3 KB Created: 2020-08-10 01:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11b2fd9e497a76a8858f77fcf9c57f4c SHA-1: 3ecbd3642a12e38b8d0dd7579c0fa0ef75782992 SHA-256: 6abd5a0c8eea76d349753199bc839a739982730faaab33645e766254178cfe38
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body itself is heavily obfuscated and contains a mix of text and what appears to be binary data, further suggesting malicious intent.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.cc/pify?keyword=florida+code+of+judicial+conduct+pdf
    • http://files.valleycatholicchurches.com/uploads/1/3/0/7/130739924/5782f.pdf
    • http://files.lovebugweddingcars.co.uk/uploads/1/3/0/7/130738676/a0142.pdf
    • http://files.theproevopeople.com/uploads/1/3/0/7/130775659/busukusositawan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/parallel_lines_and_angles_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2952/7709/files/cookie_clicker_automatic_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/76822080471.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/wugeviroxevijanutetilodi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/all_formula_of_maths_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/4457/5131/files/57630203815.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/body_boss_workout_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9667/files/63215807247.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/ketalojasonis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/dukaromodilofukod.pdf
    • https://cdn.shopify.com/s/files/1/0429/9060/0355/files/sukadanigufemesajeboromix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/breakthrough_plus_1_vk.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/martyrdom_of_rizal.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_off00006369.bin
922782ddad454c9f8ec0bff8de9efbb8de6438cb20aaac40d75c7e250c052efe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5004 bytes
font_01_sfnt_off00007484.bin
0d52d6e4ebe0b5bce5db9e6fd75d9d22a6b19659900049fef19444025fae6dae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7484 10740 bytes

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