Malicious PDF — malware analysis report

Static analysis result for SHA-256 8232543e1ff8f238…

MALICIOUS

PDF

40.0 KB Created: 2020-08-15 07:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0d1f25137233c34f812db9e9d912067 SHA-1: 464b07c7a220a06627f45253fbf365a19b014bd0 SHA-256: 8232543e1ff8f238e9e67e91f3bd4a876a60092d337d1b3e7f801d745e6bdbb2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, many of which point to a redirector service (ttraff.com). This indicates a link farm or redirection attack designed to lead users to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the ability to determine further payload delivery or execution details.

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.com/wb?keyword=kings%20of%20israel%20and%20judah%20chart%20.pdf
    • http://pumute.cairngormsnaturalburials.co.uk/uploads/1/3/1/8/131857054/velolujegura.pdf
    • http://files.donnariverafurniture.com/uploads/1/3/1/4/131453484/kenitidufonuriwaso.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/89418131157.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8822/files/the_birchbark_house_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/74243845015.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/vebavis.pdf
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/vemosudibakijowajijage.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/2559540967.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/93614739058.pdf
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/fivanufabajujo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/88026512986.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_off00005c17.bin
8301d5e6a1bca89380aa029f7d04b3ffc83f8badf91a0a4be36b5d7bc949e5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C17 5496 bytes
font_01_sfnt_off00006ecd.bin
6b267b3007168ae1f76deb1c314c70ccaae2039d9e563cbe093f6966c87713fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECD 10692 bytes

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