Malicious PDF — malware analysis report

Static analysis result for SHA-256 2760a2f4c0e6fc5d…

MALICIOUS

PDF

43.2 KB Created: 2020-09-02 13:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 727679a6d898439f58203cb33d79f7fa SHA-1: 15416aace0fc73ace61be298fa00b1f49823a27b SHA-256: 2760a2f4c0e6fc5d7522d7020a4a011ff8a8f04ca8ab5d1a81ffefbe151f4ab7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=blank+u.+s.+map+pdf', which is flagged as malicious. This suggests the document is designed to redirect users to malicious content through a link farm strategy.

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/wix?keyword=blank+u.+s.+map+pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/37394321319.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/66570448273.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/82922742567.pdf
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/word_pronunciation_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/46273385461.pdf
    • https://cdn.shopify.com/s/files/1/0433/1143/1838/files/pinesezu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/ruxafiwoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5758/6071/files/zizaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/labawufutejozutigurorerep.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/nixututij.pdf
    • https://cdn.shopify.com/s/files/1/0464/1344/7336/files/murifexomuzawosaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/vudikepukawal.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/reasoning_ability_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f9b.bin
ba0a5e505038170acd57e44e687aa87c83f22fc94aacced216ada449d80dbe98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9B 4764 bytes
font_01_sfnt_off00006faa.bin
82808020ad9461c680151b0133cb0f2a8a73e85ef24f89e71f88aed1d4ee095d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 10120 bytes
font_02_sfnt_off00009258.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9258 4324 bytes

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