Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c2e944d1fc0193…

MALICIOUS

PDF

54.1 KB Created: 2020-08-30 17:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45965de897842b53883923c910469167 SHA-1: f846f7edd2d2eb2ae88ee7dd35d51dc2fbab3871 SHA-256: f4c2e944d1fc0193c38f640d5e789f58115bdf1a6b679c4bd7572b2588d5a031
120 Risk Score

Malware Insights

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

This PDF document contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.me/wix?keyword=como+sacar+el+radio+de+un+circulo+sa, which is flagged as malicious. The presence of numerous links to external PDFs, many hosted on static.usrfiles.com, suggests a link farm designed to obscure the ultimate destination and potentially engage in SEO manipulation for malicious purposes. No scripts were extracted from this sample.

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.me/wix?keyword=como+sacar+el+radio+de+un+circulo+sa
    • https://static.usrfiles.com/ugd/b8c837_f5eccc9b80a5459c9e43c2885ebfc1c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_470e11c826a442f0ab865352db2ba501.pdf
    • https://static.usrfiles.com/ugd/913720_1223f50c7b6d4daf97a4ec3b1819c026.pdf
    • https://static.usrfiles.com/ugd/0a593f_6bce315482bd431ea79c0a1c8bf3e3ea.pdf
    • https://static.usrfiles.com/ugd/ca300b_e50cec89f5404e63a3c10c0a6564ab45.pdf
    • https://static.usrfiles.com/ugd/a771bd_7204d54b4e30498bbf202d901e3136d2.pdf
    • https://static.usrfiles.com/ugd/5438e3_ea8569487abc4d15abd2672fc94f9561.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_456ffff2bb7b496dae2f6bc27310a721.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a8e8b88ce3f42ecaa4fc7149577fd9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f601a48014ad4ce6a86afe8b1550cd5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5941800d48d84f419c6aca8870b62f18.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ba76e6f4d184b03be124e56bc753a98.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/bafudeduxeni.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/beginning_middle_and_ending_sounds_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/how_to_read_candlestick_chart_patterns.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068e2.bin
edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E2 6440 bytes
font_01_sfnt_off000078d8.bin
a76fb2693b283e86197dd20d6a5ab2337bd660e119685acd7518b12ae9176437
pdf-font-stream PDF embedded font (sfnt) at offset 0x78D8 4992 bytes
font_02_sfnt_off000089af.bin
5b28a4d587e671d216a96b441d39372112bc3f0874450b8513f214ec5802ad35
pdf-font-stream PDF embedded font (sfnt) at offset 0x89AF 13252 bytes
font_03_sfnt_off0000b30c.bin
03bd1eb71a612743895a93d3c64695ca8d6a42c9620ac73c60bd1a251fc33307
pdf-font-stream PDF embedded font (sfnt) at offset 0xB30C 16520 bytes