Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf46847606321c87…

MALICIOUS

PDF

45.0 KB Created: 2020-08-07 21:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a03539da00bdb8516807cec41b5ad7 SHA-1: 1d097c048d0abeb75aeb321741286ba9fcba3926 SHA-256: bf46847606321c872cc5fc5800d78783fa5053336d73d04c7dfc2b2767e9a479
120 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, disguised as a Kubota tractor owner's manual. The document body, though heavily obfuscated, contains the text 'Kubota l3000dt owners manual' and the malicious URL. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to distribute the malicious content.

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/wb?keyword=kubota%20l3000dt%20owners%20manual
    • http://files.skinnephotographyllc.com/uploads/1/3/1/1/131163667/4872750.pdf
    • http://files.diceatdusk.com/uploads/1/3/1/3/131384070/4ec88514863e.pdf
    • http://files.janetlblack.com/uploads/1/3/2/3/132302894/39d3a665aa4a7.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/wreck_this_journal_everywhere.pdf
    • https://cdn.shopify.com/s/files/1/0430/5666/0633/files/95353820164.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/15435626632.pdf
    • https://cdn.shopify.com/s/files/1/0431/3897/3857/files/fuzagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/convert_to_microsoft_word_document_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/quick_sort_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6834/files/1419452958.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/54028528025.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/92775348626.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2153/files/almost_home_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/gafix.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/zajumivubatu.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_off000064f0.bin
52034c0ff421865a804b61a00ae8415660f6120a3f2539946ac6ff676949abbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F0 5480 bytes
font_01_sfnt_off00007788.bin
249c47d8b921121aa34d8a4af710b0ad0ae3222c6516b843ea133f6f20e31022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7788 15376 bytes

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