Malicious PDF — malware analysis report

Static analysis result for SHA-256 239b920eb6db5d4a…

MALICIOUS

PDF

42.3 KB Created: 2020-08-23 15:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c44ecb1127b0e656d8a8b19760d45eb2 SHA-1: 2c72a23208a0df59d3dc76ad7a4669087278ffcc SHA-256: 239b920eb6db5d4a3d33e6d9279390f72f78209a813bb8fdeeb1da993851d39e
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, directing to various domains. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', which is likely used to obscure the final destination. The document body, though malformed, contains the same text as the URL parameter, suggesting a lure. No scripts were extracted, but the extensive use of external links points towards a phishing or malware distribution attempt.

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.ru/pify?keyword=dim+sum+pastry+sheets
    • http://jukebud.redeemernewton.com/uploads/1/3/2/6/132683008/paginowevugalap.pdf
    • http://files.oldfieldfarmhorseandhome.com/uploads/1/3/1/4/131437474/6209791.pdf
    • http://xogarenu.garnerbass.com/uploads/1/3/1/4/131407440/leniwokonefupus.pdf
    • http://desalar.granburyroofers.com/uploads/1/3/1/4/131452883/8dc47568.pdf
    • http://files.gmcvsuites.com/uploads/1/3/1/4/131453453/voradusosekutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/jekajirexo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1087/files/mtvss_access_consciousness.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/1295828708.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/14097247535.pdf
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/axar_publication_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0436/6280/3097/files/wivapuxusagoduzenibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/62189681525.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b80.bin
71fd206e6b364b4956b724c54588378bcebf4ecd540f46c4fc9c385792c48d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B80 3612 bytes
font_01_sfnt_off00006868.bin
452ba76ac6b1e55d6f63814bd9951feaa373378701a9e0ef1d7e05c66fb18438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 5128 bytes
font_02_sfnt_off000079c0.bin
c2d1c7d50aed36666dfeca746e7a57573ab07de0e6a105e87b0d4cc387ddc806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 10140 bytes

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