Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8587788bbdc7025…

MALICIOUS

PDF

37.0 KB Created: 2020-08-27 16:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fc9248b1179e6ee7f593bd1d6957bf7 SHA-1: 55f38ed79bbbec1df4c421c2dc854f387cf3c2e6 SHA-256: d8587788bbdc70251e9b29d66034bd764f21d77f5c31cb4f221934d5a7ce85ef
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=taotao+thunder+50+manual'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0427/9838/3260/files/dalipafabo.pdf' being the first identified. The document body, though heavily obfuscated, contains references to the redirector URL and other embedded PDF links, suggesting a lure to external 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.ru/pify?keyword=taotao+thunder+50+manual
    • http://files.thecabinetshopoftroy.com/uploads/1/3/0/8/130874422/4501692.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/dalipafabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3990/files/brocade_m6505.pdf
    • https://cdn.shopify.com/s/files/1/0432/9514/6139/files/sample_checkbook_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/25167695575.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/pobobop.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/nevetabuximim.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/16545990003.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/denejezizawefepasirivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/kobutezigabokusisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/43989311805.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_off000049fc.bin
280e4d092905d9ab0c2c0913ac0e52a6571f74a89e8096dd59356427e63019f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49FC 5104 bytes
font_01_sfnt_off00005b28.bin
7623cbf1c0e79527b34d40eaf5489cbb8f8d2df5106c4f8770102e5692c732f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B28 14060 bytes

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