Malicious PDF — malware analysis report

Static analysis result for SHA-256 9139cb23d7ffe408…

MALICIOUS

PDF

48.6 KB Created: 2020-07-31 09:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a773c26e4dd4fb01e19eca6d1b4d19 SHA-1: b9268162f41631a3b36c5bbf8b2ad74cfaea1e7d SHA-256: 9139cb23d7ffe4082f7e5b240ac0365908bb3767e26eb222b3d41826d3c0e766
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains but ultimately redirect to the malicious domain 'ttraff.cc'. This indicates a link farm or SEO poisoning tactic designed to trick users into visiting malicious infrastructure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=tablas+de+atmosfera+estandar+pdf
    • http://files.bluewatercopperworks.com/uploads/1/3/0/7/130775465/digejadez_geperix_mukulekadove.pdf
    • http://files.tallonresearch.com/uploads/1/3/1/3/131398094/mijenisi.pdf
    • http://files.suburbandetectiveagency.com/uploads/1/3/1/3/131380052/3257553.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/65467755126.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1729/files/sefegizibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9815/files/32855094130.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/gamobaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/xuzoloxusigominomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/22740067654.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/31345405526.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/64956549334.pdf
    • https://cdn.shopify.com/s/files/1/0432/0237/9939/files/36759461393.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3287829

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007512.bin
8c3d54566256b169fcd7d7ca0dfdf1e36070eb02c081441370c2dc58e161a5c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7512 5016 bytes
font_01_sfnt_off000085f8.bin
c03b2e9ec581a37f292765e1271bcb198d5f64317d524bf9ea979f39e3fd3647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F8 14988 bytes

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