Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cffb139029c9fbc…

MALICIOUS

PDF

36.3 KB Created: 2020-09-13 14:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00ae3f217a23721d47a3a209566a4517 SHA-1: 7fad95dd64ec6600b4c725cf88d9a82c4e4315eb SHA-256: 2cffb139029c9fbc29f7fb3215e7880c37b8780ac2e8b10fd4d359d709b55b05
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to PDF files hosted on various domains, suggesting a link farm designed to manipulate search engine results or distribute malicious content. One prominent link, 'https://ttraff.link/wix?keyword=pssa+2020+handbook', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL and other PDF links, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/wix?keyword=pssa+2020+handbook
    • http://files.satmasterkey.com/uploads/1/3/0/8/130874510/fc4515356c3662.pdf
    • http://files.briannachelseydesigns.com/uploads/1/3/1/4/131437778/wefuvisi.pdf
    • http://files.focusonthegood.com/uploads/1/3/0/7/130739140/wamofipatikapal.pdf
    • http://files.visavisdurango.com/uploads/1/3/1/8/131872037/fojike.pdf
    • http://duvomizel.kidstopinc.com/uploads/1/3/2/3/132302966/7682347.pdf
    • http://binigub.whimsycodesigns.com/uploads/1/3/0/7/130775118/2629358.pdf
    • http://files.mrscherylm.com/uploads/1/3/0/7/130775231/24c32e8e753.pdf
    • http://files.ucsbaccounting.com/uploads/1/3/0/8/130813366/zokas.pdf
    • http://zeduzu.debsbluemoonphotography.com/uploads/1/3/2/6/132681579/3221aaf8.pdf
    • https://static.usrfiles.com/ugd/ebcc4b_05ef3660166544bc97019991ffc03e45.pdf
    • https://static.usrfiles.com/ugd/2d1648_389b7b431ae8456fa2554a2bd9a8f81b.pdf
    • https://static.usrfiles.com/ugd/d1c05f_7b7fa136039443d180f3f411bff1b86a.pdf
    • https://static.usrfiles.com/ugd/79e5df_d1153819ffb34a14912f305fb63eb983.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_off0000517f.bin
166a80aefae3548cfa15ae24fceed927e1e40f3081375a50dc7a9b7d302d7ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x517F 5264 bytes
font_01_sfnt_off0000635d.bin
488678929f9fedf3bc51fccc7dd6728ab67ca4a789fa656203daf8468b80946e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635D 9892 bytes

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