Malicious PDF — malware analysis report

Static analysis result for SHA-256 403e883300d0545b…

MALICIOUS

PDF

40.3 KB Created: 2020-08-28 01:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f520f28108d58616758a11870ac47ad SHA-1: b4c2b68430ae3ab14af8bae224cb4ba2bf883849 SHA-256: 403e883300d0545b02322e41a01f22296fdaabfa345b954be4d59a0aadb834ef
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=how+many+chapters+are+in+borderlands+3'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links to other PDF files, many hosted on Shopify. The document body contains the question 'How many chapters are in borderlands 3', likely a lure to engage the user with the malicious links.

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.ru/pify?keyword=how+many+chapters+are+in+borderlands+3
    • http://xumivelob.cheerycards.com/uploads/1/3/1/4/131483152/26ee7454e2ed4.pdf
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jakenetukuzalavat.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/68127603633.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/74137514323.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/jenepegolemonomulelozan.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/26732292950.pdf
    • https://cdn.shopify.com/s/files/1/0428/9111/6700/files/43874955352.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/worksheets_for_kindergarten_pattern_writing.pdf
    • https://cdn.shopify.com/s/files/1/0439/9883/8942/files/pogibanedowunipegar.pdf
    • https://cdn.shopify.com/s/files/1/0430/0881/9349/files/64190591279.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/butil.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9066/files/91011591799.pdf
    • https://cdn.shopify.com/s/files/1/0463/2490/8193/files/asus_vn248q_p_review.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_off00005db5.bin
247f8e9c61c7e620b90839f4a7d854a3c4ab90ebce4c2c509afe5f466daad273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB5 5772 bytes
font_01_sfnt_off0000712f.bin
62246453bf96638ab76e8b3111129feefcc643fa4155d3572616f294cf3dc43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 10336 bytes

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