Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9add0fbf1425689…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 23:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f20caa4ba8c474892c0a2586d01d139 SHA-1: 7cf502e3e88101059933df25092851f2e121d289 SHA-256: e9add0fbf1425689187de4b0ca307c6eebeb96131c687ddecfb3ac6a1ea6cf66
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many pointing to static.usrfiles.com, but one critical link redirects to a known malicious domain (ttraff.cc). This indicates a likely attempt to redirect users to malicious content or phishing pages. The document body, though partially corrupted, contains the title 'Vita flex foot chart' and references wkhtmltopdf, suggesting a lure document. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirector pattern.

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=vita+flex+foot+chart
    • https://static.usrfiles.com/ugd/b8c837_17deed89015940d9a6f183a05e92f7a5.pdf
    • https://static.usrfiles.com/ugd/eda9ba_b02980bf932e41968a405149ea43ed45.pdf
    • https://static.usrfiles.com/ugd/b8c837_f702f7ca07b3449f80b3d98b7fa04ab3.pdf
    • https://cdn.shopify.com/s/files/1/0441/1781/9544/files/eclipse_2019_zip.pdf
    • https://static.usrfiles.com/ugd/930050_dbd46871163446cb95ed7db02f3e94d8.pdf
    • https://static.usrfiles.com/ugd/d94ae5_29037a4a7bca42e98f9a557865cc40fb.pdf
    • https://static.usrfiles.com/ugd/6846fe_95bd8645045a4d1e914c4c7e997b17bb.pdf
    • https://static.usrfiles.com/ugd/f55bec_25f652a16b6446f8a29b9988d995bb70.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_b3bf08b02ad34d7e81d19e935bd2b6c4.pdf
    • https://static.usrfiles.com/ugd/eed56f_d3de3a438d6d49fa817ef1b034db9ee7.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_off00005e1b.bin
e73ce5a60693689b03872b2ab7bac81953e28487c17e08ed73f4642cf58435dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1B 4508 bytes
font_01_sfnt_off00006d81.bin
0a8b916216730399e0a5ed9258ae167233b6a3ba2b6cabb5e386f4591a61ddb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D81 10052 bytes
font_02_sfnt_off00008fcc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCC 4324 bytes

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