Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca796d197357f7dd…

MALICIOUS

PDF

50.5 KB Created: 2020-08-06 19:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84f7f2bb109f79497daffb995c58858d SHA-1: d14f0abf10f77f07ac67853326f067f7365548db SHA-256: ca796d197357f7dd249a8b933c5265f4097193242ad8984c25572d45dc180fd7
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=business+law+book+pdf+download'. This indicates a phishing or social engineering attempt to redirect the user to malicious content. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely to improve search engine ranking for malicious lures. The presence of a 'download button' heuristic further supports the social engineering pretext.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=business+law+book+pdf+download
    • http://files.thesouthchurch.us/uploads/1/3/0/9/130969204/0b5a3ff.pdf
    • http://files.crashgem.com/uploads/1/3/1/3/131381078/4f1135dfb404b35.pdf
    • http://files.flowersbyroseus.com/uploads/1/3/1/1/131163599/tenixovukum.pdf
    • http://files.preservetennis.com/uploads/1/3/2/6/132695329/4023419.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/rovaveziwefiwawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7619/files/xubafum.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/46592534999.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/susabupeletuzadapixewabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/fukizumumonaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/cryptocurrency_investing_for_dummies_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5203/files/16787712141.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/81684882012.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/kaxorewonazujawixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/74637830811.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/vetiwedakuxaraxolebugez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/45425677753.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/61822924668.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/3873356534.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000682a.bin
f6d8f0c111dd8b7acea4675c0ab710aee574dfbde482b739aef85f37a17f2c37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682A 6832 bytes
font_01_sfnt_off00007978.bin
a448f016aca0b3c7cf9dd47360aef6b605ca7a5959e180ec3396a1cefd37a2ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7978 5084 bytes
font_02_sfnt_off00008ada.bin
4746cca9d135f2a9a9ec84d7508e3e851c7b5f3fa307553b53b7356b87989aa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADA 10312 bytes
font_03_sfnt_off0000adeb.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADEB 4324 bytes

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