Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce97bb8d545915ab…

MALICIOUS

PDF

62.0 KB Created: 2020-07-31 11:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 832ab51f5981a09b825837acae7c5e71 SHA-1: e01fcf88d94149a22155ec07ac111adedd22f35f SHA-256: ce97bb8d545915ab157bd9be4aade94f26764d839329bd55b712a2bdfd4c8d91
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to Shopify-hosted PDFs, likely for SEO manipulation to attract victims. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

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/pify?keyword=mcq+on+cardiovascular+system+physiology+pdf
    • http://files.urinalvinyl.com/uploads/1/3/1/1/131164159/gazipibis_xanazumul_lupezixi.pdf
    • http://files.xplicator.info/uploads/1/3/1/3/131381607/3324202.pdf
    • http://files.haddowphoto.com/uploads/1/3/0/8/130813325/15d873633993fc.pdf
    • http://files.interactivedrawingtherapy.org/uploads/1/3/1/4/131438046/vusaluderunuvele.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/mosemafovadixad.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/zabanovebebabulevusup.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/vepuzokimi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/zotifeju.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/89720828413.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/65891483728.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/74016578961.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/mebuved.pdf
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/18964909455.pdf
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/zurajakilori.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_off0000b38c.bin
447e7f44c63796e0ec6d5f301055f71c793b27e3a133a14f57e0b24c86d095e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB38C 5744 bytes
font_01_sfnt_off0000c6f4.bin
af32e767c6ba5373dba06786709fad5f050a89b384d409915597a89ba5dc0de7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F4 10452 bytes

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