Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3268e544452a691…

MALICIOUS

PDF

36.9 KB Created: 2020-08-08 16:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7aa58947f345cd85aee202ae956572b SHA-1: 6f6848795d1a29edd9f58941f16f93cf276f6960 SHA-256: f3268e544452a691001743151c9c76469b55a7585d10e8db2807e0d49e142a4d
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL, 'https://ttraff.com/pify?keyword=functional+analysis+pdf+yosida', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a lure to a malicious site. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points to a phishing or redirection attempt.

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.com/pify?keyword=functional+analysis+pdf+yosida
    • http://files.davidviolet.com/uploads/1/3/1/4/131411245/jokovurase.pdf
    • http://files.claireallegrataylor.com/uploads/1/3/1/4/131438120/ce1bced.pdf
    • http://files.bellanoirclothing.com/uploads/1/3/1/3/131382239/915188.pdf
    • http://files.skipscards.com/uploads/1/3/1/3/131398366/329a9941.pdf
    • http://files.sagharborflorist.net/uploads/1/3/1/3/131384468/fitigeteben.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/22716456470.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/wopenetel.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/devidedetiwod.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/3111494265.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/csgo_autoexec_commands.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/electrically_conducting_polymers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/pudonudedobiramusi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/xoneronuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/71739937530.pdf
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/40490649594.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000447c.bin
3484c4f0efdd4e8caf881dbc65871d45ed25f0786cd6cb72102550338ee66d68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x447C 3508 bytes
font_01_sfnt_off000050ed.bin
1781f1a82d0a357700507efbbf2e8895fc058e38a2a6cdaeae0ec48a056f808b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50ED 5112 bytes
font_02_sfnt_off00006277.bin
0be8a91cebb326261b7a72e750ffb0d7099341bb41fd29e2a247bcd4ff00896d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 10072 bytes

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