Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3efd53533499c8b…

MALICIOUS

PDF

54.4 KB Created: 2020-08-10 04:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fccfbfa37475593bd5045d2f3888b47 SHA-1: c08e2b6d62a0ec41d99d65cf08a8ec563bc5f122 SHA-256: d3efd53533499c8b6dbe3bcbad24c94e00569429ed4a2da91328d86e7da21e88
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=aprendizagem+motora+de+discrimina%25C3%25A7%25C3%25A3o+e+verbal+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure.

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=aprendizagem+motora+de+discrimina%25C3%25A7%25C3%25A3o+e+verbal+pdf
    • http://files.magisktgott.org/uploads/1/3/0/9/130969938/56ce40296c.pdf
    • http://files.patersonsland.co.uk/uploads/1/3/1/4/131407135/kozulazobori-vemijamepexafor-seriwewadotavu.pdf
    • http://files.cobusinessadvisors.com/uploads/1/3/2/8/132816096/5578153.pdf
    • http://files.marvinsnider.com/uploads/1/3/0/7/130739174/fatewor-naxeloke-kaguv.pdf
    • http://files.smartstartdriving.ca/uploads/1/3/0/8/130814408/6543536.pdf
    • http://files.patersonsland.co.uk/
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/tales_of_vesperia_estelle_artes.pdf
    • https://cdn.shopify.com/s/files/1/0435/2602/9463/files/ditexul.pdf
    • https://cdn.shopify.com/s/files/1/0428/5448/2079/files/29003989680.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/36885155988.pdf
    • https://cdn.shopify.com/s/files/1/0432/6267/3054/files/wozovorajiwuwuwatobazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/basic_probability_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/wondershare_editor_pro_mac_serial_number.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/wutelekatumulapugiwed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.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_off0000838f.bin
46fb8e834b4cb37c4aa7365641803b09903d40908a8ebc391ed93ace570a271b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838F 6212 bytes
font_01_sfnt_off000097d6.bin
65433b84ca922ed23ff41f5654a0679b302b5460e7aa1992239a85e3b8f29863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97D6 16672 bytes

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