Malicious PDF — malware analysis report

Static analysis result for SHA-256 e200dfbaf86f3829…

MALICIOUS

PDF

49.2 KB Created: 2020-08-04 18:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 862dfa7d09d71aa2ba2a218c87def6f2 SHA-1: afef34f99a95c0ad02f29f9b4c4a61f9ca29b67d SHA-256: e200dfbaf86f382938882020900424158750f863062b7a8332d82d2ee26333aa
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final payload. The document body, though heavily obfuscated, contains text related to scientific publications, 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=conduction+of+heat+in+solids+oxford+science+publications+pdf
    • http://files.lindenwoldlea.org/uploads/1/3/1/3/131380558/7b47d6e.pdf
    • http://files.southheights.net/uploads/1/3/0/7/130738988/mafaditiva_lexurebidosa.pdf
    • http://files.talyakingston.com/uploads/1/3/1/3/131383467/1440059.pdf
    • http://files.naturlandet.dk/uploads/1/3/1/6/131607522/5267648.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdf
    • https://cdn.shopify.com/s/files/1/0429/2499/8819/files/viberosoterilepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2666/files/80940955139.pdf
    • https://cdn.shopify.com/s/files/1/0440/8829/5576/files/vevoxetojepeketudivurerol.pdf
    • https://cdn.shopify.com/s/files/1/0432/3082/2555/files/94311213758.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/nokilegojovipixokuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/43328887170.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokixud.pdf
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/98346019929.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/masuruxevelagetuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/57456584659.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/41012843880.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_off000081ed.bin
d4634897b0338b31803ef341084d6a45dfd6d07547f14f5571ec41c50a4d045d
pdf-font-stream PDF embedded font (sfnt) at offset 0x81ED 5356 bytes
font_01_sfnt_off00009417.bin
8014f2d717343b569444e5ed9dc3887f4877a71882e838e84f72c2fd7bdf2fb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9417 10344 bytes