Malicious PDF — malware analysis report

Static analysis result for SHA-256 313a90883bbc96ee…

MALICIOUS

PDF

60.8 KB Created: 2020-08-25 08:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ced1753e367d979028c6c3822a562bce SHA-1: d486a72817fb40e7ad97efd5fdc5d7df53c7acf5 SHA-256: 313a90883bbc96ee0a655fc894a49aa255561e862a1af01fde2cc2ccf00e4be7
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily corrupted, contains text related to 'immunization schedule table pdf', likely a lure to encourage clicks on the embedded malicious link.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=immunization+schedule+table+pdf
    • http://filatep.tnooyi.com/uploads/1/3/2/6/132683014/3675945.pdf
    • http://vokidul.morningrosehouston.com/uploads/1/3/0/7/130776208/botuf.pdf
    • http://kusaruki.imsweightlosscenter.com/uploads/1/3/2/7/132741555/3100363.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7107/files/28342139892.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/76263016599.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7007/files/arthritis_uk_knee_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0746/files/56752530769.pdf
    • https://cdn.shopify.com/s/files/1/0435/5561/8977/files/54951675216.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/bivabixakepopevujop.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/20327295063.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/46684303113.pdf
    • https://cdn.shopify.com/s/files/1/0429/8217/8979/files/xiratuvafid.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4183/files/48836969206.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/36053234850.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_off0000b0fb.bin
a4f586839a979bddabae8fcdf0e53c86e58ed6866ef1c931c862c6e0becbb12c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FB 5424 bytes
font_01_sfnt_off0000c349.bin
005e72cc9704c844e566ffdf3c2e7f59b032e5c6a349be05d48cd2fac58d364a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC349 10260 bytes

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