Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70cc7670c072dc5…

MALICIOUS

PDF

42.5 KB Created: 2020-08-02 13:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 029f3b0d4c6ee1412bb9308c246d0e94 SHA-1: 3357c2a058985871b44e6cf359ed695d5480145b SHA-256: f70cc7670c072dc5473b82d4c81b10642122054813505901fb3ad28ebc78c820
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into downloading further malicious content. The document body and embedded URLs suggest a phishing attempt disguised as a free PDF download. The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm strategy to improve search engine ranking for malicious content.

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.cc/pify?keyword=visual+basic.+net+for+dummies+pdf
    • http://files.strongevan.com/uploads/1/3/2/3/132303035/686ea56009b3.pdf
    • http://files.napavalleycoffinraces.com/uploads/1/3/1/3/131382274/vamupeleka.pdf
    • http://files.grayslandhoa.com/uploads/1/3/2/3/132303238/03276.pdf
    • https://cdn.shopify.com/s/files/1/0440/5988/5733/files/jolakebaxabosukejefinor.pdf
    • https://cdn.shopify.com/s/files/1/0434/6544/1430/files/gijugumukamuwekanogole.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/27629269263.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/gugakowolukejidobibad.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/85188821996.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/16809798781.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/wagokajubamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/60848114835.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/xutotewewema.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/526428265.pdf
    • https://cdn.shopify.com/s/files/1/0430/4060/4314/files/29682861271.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/11237906747.pdf
    • https://cdn.shopify.com/s/files/1/0440/6771/7270/files/c_byte_array.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_off000067e6.bin
77585e46dddae655a7b11bf4c4fb648eeb0615c9aeef5a9598138e3522b12619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E6 5436 bytes
font_01_sfnt_off00007a51.bin
73081df4509a0e41a05a066b1719139aff41ef5c6169bf38e3a3466527d4ea73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A51 10192 bytes

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