Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd0cde357788101…

MALICIOUS

PDF

43.2 KB Created: 2020-08-23 07:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce0091b67359f8927c69211a31b358a8 SHA-1: 7914d1a1e531ae6602981b9778a84056121f11bf SHA-256: cdd0cde357788101c99657bf328870b323349bb450f60ea9aa0daad76693fb1e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to generate traffic or distribute content through numerous links. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=advanced+cardiac+life+support+guideline
    • http://files.thestoryofkanji.com/uploads/1/3/1/6/131606343/6635522.pdf
    • http://vadara.straitfromthefarm.com/uploads/1/3/0/8/130873867/renametuzigonef-jonuzefupavat-fijuxi.pdf
    • http://files.mdt-agilityability.com/uploads/1/3/1/3/131379894/kiseg.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/el_caliban_y_la_bruja.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/ritama.pdf
    • https://cdn.shopify.com/s/files/1/0450/3499/5870/files/introduction_to_chinese_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/5663158552.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/zisulos.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/50469716929.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006af2.bin
b2291afe8912fd54278f864b23165c185f27cb75f810921359bc5af4b56d216c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 5372 bytes
font_01_sfnt_off00007d49.bin
8c7e69fa6f640c1043a46ed853f7a21135629774487a059c8ccc2aa49558f4e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D49 10140 bytes

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