Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeda334c3c929a44…

MALICIOUS

PDF

33.6 KB Created: 2020-09-02 01:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 866a500d912ccc4c9df49fd6ff5212b7 SHA-1: 6b18d4483376e109186f351c7948f2e15960d05f SHA-256: aeda334c3c929a44e91c353d94658409c2a1fa34f09e725d9e57c6105e70cf87
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=gears+levers+and+pulleys+worksheet'. This URL is presented within the document body, disguised as a worksheet, indicating a social engineering attempt to redirect the user to malicious infrastructure. The presence of numerous other links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. No scripts were extracted, and the document body itself is heavily obfuscated, but the primary malicious intent is clear from the redirector URL.

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=gears+levers+and+pulleys+worksheet
    • https://static.usrfiles.com/ugd/b8c837_3010b412e38b43359fd62b332d980e0e.pdf
    • https://static.usrfiles.com/ugd/2f3216_0f69e42b9f36405f8495749da4f4ecb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbafac0e7d174d3388260a72d41f770f.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/convert_cdf_to_python.pdf
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/groovy_null_check.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/birevojoxujimal.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/1089738062.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/lupekerowowedidugalokov.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/85615968795.pdf
    • https://cdn.shopify.com/s/files/1/0432/4468/3419/files/55479211063.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0428/files/nds_to_cia.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/96651845926.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/vosubumojemawofabuwe.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_off0000478e.bin
01eb7f248a2b2619bc854d65a0fb264c67ddad7e4a59af01004ec0fa4bcca5b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x478E 5396 bytes
font_01_sfnt_off000059ff.bin
28f144a57134f10dfc4e8e3c32ec25120e3f1aef6b65c2dddf8fa503df48ce2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FF 9236 bytes

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