Malicious PDF — malware analysis report

Static analysis result for SHA-256 4736c5aefedaf6e4…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 04:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf4f95b4d880f491409ebf01ccb14a82 SHA-1: 5e962c8be07250fb9bbf16ee22dfb1f12149383a SHA-256: 4736c5aefedaf6e4807b5b53990de23037baced45ffa6e6780d9f9dd3198a16d
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary links points to a known malicious redirector. The document body itself is largely unreadable binary data, but the presence of the malicious URL and the heuristic firings strongly indicate a malicious intent to redirect the user. No scripts were extracted from this sample.

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.ru/wix?keyword=mapa+de+buenos+aires+com+pontos+tur%25C3%25ADsticos+pdf
    • https://cdn.shopify.com/s/files/1/0440/6063/9384/files/22938829066.pdf
    • https://cdn.shopify.com/s/files/1/0428/8993/7055/files/68903315581.pdf
    • https://cdn.shopify.com/s/files/1/0435/5185/0647/files/68854132189.pdf
    • https://static.usrfiles.com/ugd/d78803_d12b7a4099274a5984ddce84e562d7d4.pdf
    • https://cdn.shopify.com/s/files/1/0444/8341/2135/files/lowejipenirogizaxalidigiz.pdf
    • https://cdn.shopify.com/s/files/1/0462/7093/9293/files/gazebo_resort_pattaya_formerly_pattaya_beach.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/neriferatupumuterosesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/18463319864.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/66052190549.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/mazevopedotor.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_off00006400.bin
5cfb84ab5fecf97d83c5bf054969a5aacc78676590e6d505ebdf6b99756d5f54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6400 5468 bytes
font_01_sfnt_off00007686.bin
7197be5d17a79c86ca1f92771d9d9ddffa83d5bbf0c5f14d8b3d6b765525b29d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7686 11200 bytes

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