Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe25765834872ae…

MALICIOUS

PDF

45.7 KB Created: 2020-08-29 20:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56fb67e6bb8af967f61d75650bd7c33f SHA-1: 42ea8eee274554d6fb077700a3a891485cf7e666 SHA-256: cbe25765834872ae078447057bf70e7678783a40fc631bddd90dfad4ce9ad5c7
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'best desktop computers 2016' and the malicious URL. The file also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to drive traffic to the malicious redirector.

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/wix?keyword=best+desktop+computers+2016
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/zulof.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/alchemist_dota_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/18244438749.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/43851705313.pdf
    • https://static.usrfiles.com/ugd/b8c837_59576f33e5104edd9ab1cbd62367a1f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b2ea211f6774780906f6e8b7e9151f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d7b570e39364345b586ef21a392c2a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f09d60521aa945498fa562463d25a67d.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc3117f1577f416aa34490a5af1601f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_142d06d0d48648f5ad754cc3745b896f.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcb5a92ffbb44ee88f73d57a1dca71aa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/mopipir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/physical_science_grade_10_siyavula_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/jegejedetefego.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/vapedugorelorowudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/fundamentos_de_metodologia_cientfica_lakatos.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_off0000734c.bin
6d49441a5cbcb1cd0c5a018e316eb83ee3dda978a54d5d35ce00ab0cce40a09c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734C 5568 bytes
font_01_sfnt_off00008637.bin
4fef27422905196d545354f5d110119e6bb0cfd356d633bb5a9d9157c07805a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8637 10512 bytes

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