Malicious PDF — malware analysis report

Static analysis result for SHA-256 c988c1bcce6bf48d…

MALICIOUS

PDF

47.8 KB Created: 2020-08-03 21:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6960c5d1433bb1095c146e0eb7dcfa9f SHA-1: 6d444a5fec632ffd2665eda99431fd152ac0faf6 SHA-256: c988c1bcce6bf48d70b2043c1f1ab20a8dd6c9a3453a13edb98cb43ccb593be6
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=algebra+2+quadratics+test+pdf'. This URL is embedded within the document body, disguised as a search query for educational material. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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/pify?keyword=algebra+2+quadratics+test+pdf
    • http://files.sanmarinogirlscouts.com/uploads/1/3/1/4/131482953/xumilufefi-ditobebu.pdf
    • http://files.migueljuliobeauty.com/uploads/1/3/0/7/130739697/0909947f0aa63.pdf
    • http://files.ahacroatian.com/uploads/1/3/0/7/130739525/buvopovoxoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/pinadizakipitukuxix.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/halo_ce_product_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/31097169801.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/53072630080.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gerakofidasetivivirodipel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36726725464.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0431/4546/1909/files/97965522286.pdf
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/72330247473.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/54733738918.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_off00006e0d.bin
8dfcfeaa1c367c1d14fbeda76ed257bed7062393499369b60a880e24e90c3c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0D 5712 bytes
font_01_sfnt_off00008183.bin
489e8440a291bd0f10a577f0e038e569a317d3eda3a135f30ef02332eea23acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8183 15352 bytes

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