Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9dd21499f73128e…

MALICIOUS

PDF

43.9 KB Created: 2020-08-10 13:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a88e089666781a375844249c8a2970ca SHA-1: 43d1602b7c2c76c9164f8b2d45de0a884111297c SHA-256: b9dd21499f73128e65745b0969f9c8de5a7ae9eb447369e816e40b89ab1200dd
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, disguised as a financial blueprint. The primary malicious URL is https://ttraff.ru/pify?keyword=barefoot+investor+blueprint+pdf, which likely leads to further malicious content. The presence of numerous links to PDFs hosted on Shopify suggests a tactic to obscure the malicious destination and potentially leverage benign-looking domains for distribution.

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.ru/pify?keyword=barefoot+investor+blueprint+pdf
    • http://files.rossmiller.co/uploads/1/3/0/8/130874201/faac030cd18.pdf
    • http://files.palominoaustralia.org/uploads/1/3/0/7/130775277/3943686.pdf
    • http://files.saltbox-lane.com/uploads/1/3/1/4/131407977/pedosidisojuxofazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4442/2310/files/75545655100.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/63628403869.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/divergent_allegiant_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/61687014771.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/baobab_cafe_and_grill_menu.pdf
    • https://cdn.shopify.com/s/files/1/0452/2721/2957/files/save_webpage_as_firefox_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/24122849320.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1537/files/ssc_stenographer_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/82520446327.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/92536492278.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/xeboboketitogow.pdf
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/harley_davidson_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/latex_page_break.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_off00006cc6.bin
f2fcb59cc45a8da2bd19f2f4ce6d39f89ab669f2046fcfe92d90da56e65fe338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC6 5284 bytes
font_01_sfnt_off00007ecd.bin
7b643becd5ce483917918b3e748cec8f3d29505a7ba3298ef7ec6d4e1e053d3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECD 10548 bytes

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