Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3fc61c0d20ddd3…

MALICIOUS

PDF

32.3 KB Created: 2020-08-29 18:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f6b2f83511da40d614c3afa75c80721 SHA-1: 5556cbe2d7e54824f762053d839374aa7a812e7d SHA-256: 9d3fc61c0d20ddd3fbebeeecd2925e13064b9cff58f8d375b8f297934d23b994
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, with one identified as a malicious redirector. The document body text is largely obfuscated but contains references to a 'cybex arc trainer assembly' and embedded URLs. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign links.

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=cybex+arc+trainer+assembly
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/47504429755.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1935/files/87410591889.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6023/0294/files/monitoring_and_evaluation_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/bivituwoni.pdf
    • https://static.usrfiles.com/ugd/b8c837_da597b5dc8d14027ba045ec08f63c16b.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/rajuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/26524144201.pdf
    • https://cdn.shopify.com/s/files/1/0459/6255/9648/files/89116441052.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7607/files/3292336678.pdf
    • https://static.usrfiles.com/ugd/b8c837_d79d1c501e264d2aa62e0e9b680804c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_88e3500285b94696bd11af5ced4611ed.pdf
    • https://static.usrfiles.com/ugd/0a0016_4f02d66c0b2546f3b20095387e05fb33.pdf
    • https://static.usrfiles.com/ugd/b8c837_c180215a48c347af82da553412fb9ca4.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_off00004331.bin
babc070a157b6e3e3f9dc340a2ba0a71ad52ff89ccb819c94bcb4904c21b5d4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4331 5160 bytes
font_01_sfnt_off000054a9.bin
ef32271361f414b0f8c67ab08587b0dbc55506754c51de5cbd372a60050a261d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A9 9300 bytes

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