Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24e0f033cd55520…

MALICIOUS

PDF

49.3 KB Created: 2020-07-31 14:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b3dcffca9ed8b235b0964dc2852e912 SHA-1: a5cbd2c3f0067ec0e85822acf5527bbb6c6a60e1 SHA-256: d24e0f033cd55520d6e7c4e8fbb580b58422cf9f6425a9a8ce4766f46c2e25d0
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, appears to be a lure related to financial analysis. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or content distribution network used to host malicious or redirecting documents. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=balance+sheet+analysis+and+credit+appraisal+for+bankers+pdf
    • http://files.andrea-sangiovanni.org.uk/uploads/1/3/0/8/130814387/budezubinovo_silawuzupujinan.pdf
    • http://files.midstatetrim.com/uploads/1/3/0/7/130775953/30c47a3e.pdf
    • http://files.peopleshousing.org/uploads/1/3/1/4/131453294/c6f699eccc6e8f7.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/gasupimulofol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/78581919506.pdf
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/9565400687.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/lageroxufufusexez.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/zuxosabebilexiso.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9611/files/59974843948.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/7746463566.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://cdn.shopify.com/s/files/1/0433/7188/8803/files/mirabexobugakep.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/zorirezirukeresaxatuwoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/bamapowofum.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/xogufoxaxosuwarasoval.pdf
    • https://cdn.shopify.com/s/files/1/0434/2379/3308/files/bimesapap.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/31740231079.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_off00007921.bin
11ce5016c08315d2ec6b22129f934f8500f4a5248947076f02bf939cc7a62f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7921 5388 bytes
font_01_sfnt_off00008b5e.bin
c79d4ece8409bd1e4af8bf1682cb84758b8326bc99d7310cd84d4c4793795f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5E 13936 bytes

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