Malicious PDF — malware analysis report

Static analysis result for SHA-256 4277ab850e37e2f6…

MALICIOUS

PDF

39.4 KB Created: 2020-08-14 21:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ac634347af51178c8fabc7726acbe97 SHA-1: e7ed9d450738a2b96e2b91a9d4424b8b42a30260 SHA-256: 4277ab850e37e2f6ec2ca9fd8f21b7bc7dca7ed11429dac2e132b59c20690bc8
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a link farm containing numerous external PDF links. One of these links directs to a known malicious redirector, ttraff.com, which is likely used to distribute further malware or phishing content. The document body contains obfuscated text and a reference to the redirector URL, suggesting an attempt to disguise the malicious intent. The file was generated using wkhtmltopdf, a tool sometimes abused for malicious purposes.

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.com/pify?keyword=persuader+lee+child+free
    • http://files.lowernorthcoastdancefestival.com.au/uploads/1/3/2/6/132681452/zogesimozojexek.pdf
    • http://files.pomilee.com/uploads/1/3/0/7/130775724/joketad-zusematu-fusulunax-vipobutazofu.pdf
    • http://files.chrisleighins.com/uploads/1/3/0/7/130739718/wovozawepotufug.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/67504190703.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4093/files/defawojunanigopejatijupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3718/6453/files/87875672074.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/90962393908.pdf
    • https://cdn.shopify.com/s/files/1/0438/7173/1880/files/nutejudokiwexuzafowowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/39138479090.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/26901542555.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/93125875796.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_off00005bde.bin
ea22c4b5b9212f44e11e206839e94c6f6758b629f85bb2c2bf37a8fe3d42f149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDE 5112 bytes
font_01_sfnt_off00006d2c.bin
d168ac6b9121855d2c525007bf1d4ce1b77c54b3fe5ab3468c228df786e5dcab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2C 10656 bytes

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