Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb369d326c19e84…

MALICIOUS

PDF

33.2 KB Created: 2020-08-19 22:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bae2eebfbfba67b76bc64c03b9d9b9e4 SHA-1: 2cd6dd3584ea33f6fa4d13f72ee01c474a7adf96 SHA-256: 1cb369d326c19e84f5f60a9d5e798c959ba185c0c494f6b408cdd88a1399b62d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains a URL that matches the redirector's target. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

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.
  • 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.
  • 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=mamamoo+starry+night+song++ilkpop
    • http://gigidimen.mistimurphy.com/uploads/1/3/2/8/132815176/8120015.pdf
    • http://files.teagardenssc.com/uploads/1/3/0/7/130775518/f5064de7151b6.pdf
    • https://cdn.shopify.com/s/files/1/0428/5785/7187/files/atlas_map_of_world_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0452/4287/6061/files/62108345948.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/54734751757.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4314/files/broiler_production_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0452/2960/5024/files/brothers_grimm_sleeping_beauty.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/dokuvaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/65319148056.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/jimalibotawujodozelakad.pdf
    • https://cdn.shopify.com/s/files/1/0439/3733/3406/files/91711374253.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/65295272484.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rakapadanixip.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_off00004162.bin
3cae33368768ae6143a8150b0fdd931cba282480e4fff6cfa24068ecf6212e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4162 5404 bytes
font_01_sfnt_off000053a7.bin
29372a06ca41a52aae7572345ac07800bbcfaf80c00956f213887498dd73b581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A7 10620 bytes

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