Malicious PDF — malware analysis report

Static analysis result for SHA-256 34acf9c2080ca3ca…

MALICIOUS

PDF

34.6 KB Created: 2020-08-08 16:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddc8aec9cbc20daab6891985f93e89db SHA-1: 8e43b8e83f724b881674f342b1547642aab9e9b4 SHA-256: 34acf9c2080ca3ca4ae63365852c307cf813ac5b1a946248ed80b53b75a8ce07
160 Risk Score

Malware Insights

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

The PDF contains a lure suggesting the user needs to install a browser extension or update to view content, which is a common social-engineering tactic. It also contains a link to a redirector, https://ttraff.com/pify?keyword=bwv+1001+violin+pdf, which is known to lead to malicious infrastructure. The document also features a large number of external links, many hosted on Shopify, likely as part of an SEO link farm to improve search engine ranking for malicious content.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=bwv+1001+violin+pdf
    • http://files.wintercreekwildlifeartunlimited.com/uploads/1/3/1/4/131437725/9114791.pdf
    • http://files.newmusicsocial.com/uploads/1/3/1/3/131379552/2909752.pdf
    • http://poxosom.barecovearts.com/uploads/1/3/2/7/132712615/6f3a632.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/15484350375.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6917/files/wikidumibemabizam.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/62791148147.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/sikituzevakobebonetavob.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/89741647979.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/96707600288.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/65160278509.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/rizojegipimotowelek.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_off00004b4b.bin
60a1427e3be392526be0ce7e56952803a8adf8b2684ad9c74ea605f79e637537		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4B 4948 bytes
font_01_sfnt_off00005c5f.bin
5616b4e2eaea58d742c2e2eec4eebd1db84ce8baeb32d07462d902e04398b99e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5F 9880 bytes

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