Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2a2e20ad4e1f18…

MALICIOUS

PDF

39.2 KB Created: 2020-08-24 12:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae7f2bc483ebc50280d75640af70b402 SHA-1: c6dcc9c73abce610d42dbd2bb4f23ca4db887360 SHA-256: ce2a2e20ad4e1f18ac202b1709617c8cc79502d9944d366e81c7091451220815
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=burrito+boyz+nutritional+information', likely leads to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the redirector and link farm indicates a phishing or scam attempt.

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=burrito+boyz+nutritional+information
    • http://palur.millerptorlando.com/uploads/1/3/1/4/131482826/towut.pdf
    • http://files.davidensleydesign.com/uploads/1/3/1/0/131069766/9174616.pdf
    • https://cdn.shopify.com/s/files/1/0437/7768/7706/files/17728612628.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7555/files/university_of_chicago_booth_mba_employment_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/92470920978.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/fupuralew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/resupikatezuvugoxijapuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/7601770004.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/capital_humano_importancia.pdf
    • https://cdn.shopify.com/s/files/1/0429/7192/2591/files/5081930115.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/mepenopozupuwixizaginum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/fotutikapojegajiwug.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_off00005baf.bin
2908c0e386aca5c79d3ca1f8ec4b77d37dec31b56c271c19a41361002ab92d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAF 5076 bytes
font_01_sfnt_off00006cf1.bin
aa524eb1dba9444ed8bd7262f5d163940cfb6d710bc33fad1cafaeb19eb5dff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF1 10352 bytes

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