Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f5bdda345716e4…

MALICIOUS

PDF

39.0 KB Created: 2020-09-08 17:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52379495b1997444396d953a6eb76085 SHA-1: bf09593558ada4d75f2777fdb1e04ab23a1688ba SHA-256: e0f5bdda345716e47d4e8ddf8f3d317620324f53e00b8b11f87d6dcae1718408
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, indicating a phishing or redirection attempt. The document body, though partially corrupted, suggests a lure related to calculus, likely to entice clicks. The presence of numerous links to external PDFs, many hosted on static.usrfiles.com, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, limiting the analysis of further payload delivery.

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.club/pify?keyword=int%25C3%25A9grale+double+coordonn%25C3%25A9es+polaires+pdf
    • https://static.usrfiles.com/ugd/8d0191_eadbfada2429442b9833eb7d453fe5b3.pdf
    • https://static.usrfiles.com/ugd/e33828_85d0aef3819a49d48e25c5e0589b8fc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ffb51f4d6df4c81883c0a56039f58f7.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_a407309ea72a4478a2cee057e45cfa44.pdf
    • https://static.usrfiles.com/ugd/0bfb20_22418e2f2c2d4fddb0efe4a30e17fb0a.pdf
    • https://static.usrfiles.com/ugd/3b0c81_953e2fa31db74ca4ad75f44b38a2be7e.pdf
    • https://static.usrfiles.com/ugd/05301a_abcd3052a6a14a2797df9e760aaf5131.pdf
    • https://static.usrfiles.com/ugd/97aff7_3ac705651f00442ab13e35b343eb6588.pdf
    • https://static.usrfiles.com/ugd/f4de5e_d2197d182dcb46d1baedc908ce3760f5.pdf
    • https://static.usrfiles.com/ugd/a72fa8_0d55a79ba5914badaec697f5330470a3.pdf
    • https://static.usrfiles.com/ugd/e4bc37_e765a43458f84893a975838045e94df1.pdf
    • https://static.usrfiles.com/ugd/4733ca_9c206c7ef9b04f629e06907499b9c5bc.pdf
    • https://static.usrfiles.com/ugd/02631b_3b0ae7b8089842a1a6f1378166d1b56e.pdf
    • https://static.usrfiles.com/ugd/6cf804_5a25ec860bbe465f9896dda2cbb7cbd8.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_off0000597f.bin
6113962be0019935a8fc7e819f31c1afea3d8b905297782c3fcafa0da6e5b3e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x597F 5540 bytes
font_01_sfnt_off00006c1c.bin
75afd91eee5d3fea56ab5bd614c02df6705bdc40c2a53fb48cf79963086d3c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1C 10024 bytes

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