Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b8f72c1f9fb56f…

MALICIOUS

PDF

54.6 KB Created: 2020-08-15 21:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0596765a745314890debd9b04294d0e2 SHA-1: a7c55298eb530effe5388e20d7f0bf2144b0d49a SHA-256: b6b8f72c1f9fb56f94c5a72fd0a1449ef571c50839baea8ed1833e072a209dd5
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, indicates a link farm designed to improve search engine ranking for malicious content.

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/wb?keyword=scale%20of%20measurement%20in%20research%20methodology%20pdf
    • http://files.gracechurchstudents.com/uploads/1/3/1/6/131637016/julok.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/98459631970.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/97083615280.pdf
    • https://cdn.shopify.com/s/files/1/0435/9313/8333/files/esc_guidelines_2019_ldl.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/nagezitusivamabiwilamun.pdf
    • https://cdn.shopify.com/s/files/1/0437/2047/4779/files/big_brother_season_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30698029692.pdf
    • https://cdn.shopify.com/s/files/1/0437/6965/9549/files/d_d_manual_of_the_planes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/86284796215.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/birthday_cake_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/all_of_me_piano_guys_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/ghazi_by_abu_shuja_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/buzobonasamilesenuwufox.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_off000089bd.bin
e9df1abf47a688c52bbf36275161d4c71dd3d5463c3e540779115c3c600865d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89BD 3304 bytes
font_01_sfnt_off000095a3.bin
e311c4438fa14a3617698401845da4f894bc63153856aeb40ba22b4aa1f45bd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A3 5776 bytes
font_02_sfnt_off0000a921.bin
ac68cc773b7c0747de82266c2de386c4df6a04d2415a4a374655712309375fa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA921 10532 bytes

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