Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6a790069abdd27…

MALICIOUS

PDF

45.6 KB Created: 2020-08-03 10:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f3c2b8336bb502d03234179a1a813e5 SHA-1: 2b99398ac928e79e201104d1ffa2f5aa42d9a625 SHA-256: fe6a790069abdd2763278f89cdc77ccce8a8a8133d103d941341ad514a44fd62
128 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.com'. This link is presented to the user with a lure related to 'Twitch sub points'. The document also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=what+are+twitch+sub+points
    • http://files.thaitogether.org/uploads/1/3/2/6/132695571/1325954.pdf
    • http://files.latextsavings.com/uploads/1/3/1/3/131398008/pederifalawivak-fodoragikifek-kifol-gazak.pdf
    • http://files.ifapa-africa.com/uploads/1/3/1/4/131407767/9559722.pdf
    • http://files.michaelwilsonmorgan.com/uploads/1/3/0/7/130738722/6427696.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8726/files/wiwarutemaraturutikeni.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/83422235220.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685913575.pdf
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/64551238319.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/lirowip.pdf
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/korunago.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/nasofewonerugirutak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/91345711493.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/44623582449.pdf
    • https://cdn.shopify.com/s/files/1/0432/6975/0940/files/comfort_aire_dehumidifier.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_off00007466.bin
bee18e6a3b3a786a9cd15e6f6897bf08ee798c69010e37aa08f08c6f9d6ad7ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7466 5236 bytes
font_01_sfnt_off00008642.bin
f1583fd2253eefe808ab3c949120dcea182ec3055c70ebbf9317a5c2a40c5c9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8642 10412 bytes

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