Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff2e33a80c624c5…

MALICIOUS

PDF

55.0 KB Created: 2020-08-21 03:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad3fdcb4311a404b6f692ed95ce73e5a SHA-1: 28fb47a6f0b0a032301f0cd485ac88999da00a80 SHA-256: cff2e33a80c624c54c0c5e4254bf63e02e5ef39360bf926b27c2584f8882cd59
168 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a 'download button' lure and instructions for a password-protected archive further indicate a malicious workflow designed to trick the user into downloading a payload. The PDF also hosts a link farm, potentially for SEO poisoning to increase visibility.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/pify?keyword=dls+2020+mod+apk+timnas+indonesia
    • http://gawute.statementsbyshannon.com/uploads/1/3/2/8/132814930/fizunikopijogemaf.pdf
    • http://nijutoz.muskmeloncreative.com/uploads/1/3/1/8/131871921/c6bc160a951df7.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/multivariable_calculus_linear_algebra_and_differential_equations.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/54578494051.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/gizaduxezokugowuxomikar.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/sotavudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/72288822280.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/16617435323.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/bawuridefile.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/tosadegiwotetosi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/59531580798.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/69609509288.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/
    • https://cdn.shopify.com/s/files/1/0433/6500/7509

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083b9.bin
608ba27a41d8fda0a427b6f17027ad52ffe6e539c3b9039a9b35751f88bfdda9
pdf-font-stream PDF embedded font (sfnt) at offset 0x83B9 5344 bytes
font_01_sfnt_off000095d9.bin
f9b6467fb8931c1abc2b4f294850cc5e12a3a095fe5893941d73413a170b62fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x95D9 10296 bytes
font_02_sfnt_off0000b94b.bin
d5f7b879d4bd44d790d5ed5022df8582a6ea4dc33f751ea53f552bcb32ed4bc4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB94B 16208 bytes