Malicious PDF — malware analysis report

Static analysis result for SHA-256 23cea1a21f39d1b8…

MALICIOUS

PDF

41.1 KB Created: 2020-08-02 10:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baa0172bbbdf58c1736c804ba08d127d SHA-1: cf28bf3ae01a60817576118aed08bba70ea0a648 SHA-256: 23cea1a21f39d1b8a75fc1f35f6f94a6cb320b300bc74a5b228b04c8baae15a6
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a redirector URL, masquerading as troubleshooting information for an electric blanket. The primary malicious URL, ttraff.com, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the target URL and references to 'perfect fit electric blanket troubleshooting', reinforcing the lure. The presence of numerous links to Shopify-hosted PDFs suggests an attempt to obscure the malicious infrastructure.

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.com/pify?keyword=perfect+fit+electric+blanket+troubleshooting
    • http://files.nzchacutting.com/uploads/1/3/1/3/131398234/5916908.pdf
    • http://files.juliandhoward.com/uploads/1/3/0/7/130738841/ecfb16171fce.pdf
    • http://files.partnersinrelief.com/uploads/1/3/1/3/131380842/287251.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/fafavilubusanosijufimeraf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/sewagi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1920/4765/files/bumovafumuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/93879569229.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/95419633167.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/novamodogexiralinexepupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/rosekevisawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/33066059312.pdf
    • https://cdn.shopify.com/s/files/1/0431/3088/0162/files/80920564230.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/google_resume.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_off000062e1.bin
e919909409c9508e3739b901e0d027d9bc1e78bbd9ae26cbf172afd19a203375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E1 5348 bytes
font_01_sfnt_off00007513.bin
4ae08deb23b14bd87c03716d12a04a55c2a774021c04ce6a400947569f44937c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7513 10528 bytes

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