Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3f5220dd48ecf7…

MALICIOUS

PDF

45.5 KB Created: 2020-08-30 17:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80c3daf01e9bc98d733c1bbc28241f20 SHA-1: 7bde9ba87067378143cbbefb8dbdfec27d966eb6 SHA-256: dc3f5220dd48ecf7e2a7f6c31509e72a6b4e520b30be49dc6f170c52d86734cc
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=cell+wanted+poster'. The document body, though heavily obfuscated, also contains this URL and references a 'cell wanted poster', suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify and static.usrfiles.com, likely for SEO poisoning or to host further malicious content.

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=cell+wanted+poster
    • https://cdn.shopify.com/s/files/1/0432/5251/4971/files/nibofatupeto.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/free_d_d_5e_monster_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/install_node_with_nvm.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/scientific_notation_conversion_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/6994/5509/files/beraju.pdf
    • https://static.usrfiles.com/ugd/b8c837_48151c44e7f5418980e2c23affea03ec.pdf
    • https://static.usrfiles.com/ugd/69695d_dc0dec4eba974b65b40d5284cc457006.pdf
    • https://static.usrfiles.com/ugd/b8c837_03e43f3c253b4dedb96b00dbd9981e3e.pdf
    • https://static.usrfiles.com/ugd/c5d40f_323c6b5e263e4931be45c237b20596ce.pdf
    • https://static.usrfiles.com/ugd/c618e9_560cc7419589438e973ab9bcf84e6bab.pdf
    • https://static.usrfiles.com/ugd/bf650e_fa14ce26345348298c34199b54981816.pdf
    • https://static.usrfiles.com/ugd/eb6612_5fdfaf3202874ca781f4cffed5aefc95.pdf
    • https://static.usrfiles.com/ugd/0baf77_99faf11e9263448a8c818a279e1f16c2.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_off00006868.bin
359a13d17b11ede17a12390c057d05cac8de22608e029a158d9e923c7b025a49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 4808 bytes
font_01_sfnt_off000078d9.bin
a79da09ec423776abed78f485ba8b33313f9ed44c69b38d86fdfd0e406bf0e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D9 10412 bytes
font_02_sfnt_off00009b8c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8C 4324 bytes

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