Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4d9aa931d85fac…

MALICIOUS

PDF

40.1 KB Created: 2020-08-31 14:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4538e993b621a9f49c09cf12ae8589a6 SHA-1: 5558f02e0c9c09b55f82684cd78e522a31a63509 SHA-256: ad4d9aa931d85fac9721e79694d81746c9fe616052c926a47af74dcb4dbda0ae
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious content. One of the primary URLs, 'https://ttraff.com/wix?keyword=cute+cartoon+hd+wallpaper', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, reinforcing the malicious intent. No scripts were extracted, but the extensive link farm points to a social engineering or redirection-based attack.

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.com/wix?keyword=cute+cartoon+hd+wallpaper
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/disputing_collection_credit_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/40266692460.pdf
    • https://cdn.shopify.com/s/files/1/0457/6487/0300/files/kajilekawig.pdf
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/buvor.pdf
    • https://static.usrfiles.com/ugd/c83fdb_fff8b9ea4a73460882d59f595cf16504.pdf
    • https://static.usrfiles.com/ugd/0c268c_3762c83fd30a4f9e9f6afdb85bc86c6a.pdf
    • https://static.usrfiles.com/ugd/ae15ca_12be51716b204b879f97ae9df2a61491.pdf
    • https://static.usrfiles.com/ugd/c8a981_bbadf60fb5da48c6a6802f1a4232a84a.pdf
    • https://static.usrfiles.com/ugd/a86d68_84694c457e0048c88613c41a7b6c02f8.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_7ad68c2b3b2544c093b759e87033fcc5.pdf
    • https://static.usrfiles.com/ugd/c618e9_c660010f95bd41718a5e80c189c3c872.pdf
    • https://cdn.shopify.com/s/files/1/0457/7371/7670/files/arduino_programming_syntax.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6145/files/75705227767.pdf
    • https://cdn.shopify.com/s/files/1/0435/8845/2515/files/dieta_astringente_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/basic_synonyms_list.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/vedutekaxexuriwimufoz.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_off00005efa.bin
ae50158687d52fdc1fde24386d15c59b0353ae759f0214ddbe61b54f6f85bd90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFA 4980 bytes
font_01_sfnt_off00006fef.bin
42215b2d1908d4b4ba2e4aa101d92ae139db353836001f03a651a0eff7d90a1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEF 10684 bytes

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