Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7a459cea902b02…

MALICIOUS

PDF

54.7 KB Created: 2020-09-01 21:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d74fa2d7b6cc821d7494b598c8737ba SHA-1: feb604f37b6d1d704be416847fc086f3ed9fbce3 SHA-256: 9b7a459cea902b02c0d48e6e2de332c9ef7e3e32e7aa2edc1342fdf46e7d068b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=estrus+cycle+of+swine+pdf'. This URL is embedded within the document body, suggesting a social engineering lure. The file also contains a PDF link farm heuristic, indicating it's part of a larger SEO manipulation effort. No scripts were extracted, and the document body is heavily obfuscated, but the primary intent appears to be redirecting the user to a malicious site.

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=estrus+cycle+of+swine+pdf
    • https://static.usrfiles.com/ugd/4d400c_05c7a9b2478846a585e762aafd6f7caf.pdf
    • https://static.usrfiles.com/ugd/191a6d_dcda011154544ddf8639ba55f12bfc9f.pdf
    • https://static.usrfiles.com/ugd/87a178_e13af0c9a1464d4097e5fc77c2547eaa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3720/3364/files/jisimorifufapafujamexe.pdf
    • https://static.usrfiles.com/ugd/23e9be_23aa1fb35ae44801a6bc7bb89d54cfce.pdf
    • https://static.usrfiles.com/ugd/0aab01_bce8a558ab064895aa368838e6f04a47.pdf
    • https://static.usrfiles.com/ugd/429b25_2b38fce59955420094a6bca6e58b1ed9.pdf
    • https://cdn.shopify.com/s/files/1/0436/5680/6565/files/xedadugijifujajeja.pdf
    • https://cdn.shopify.com/s/files/1/0435/3182/9412/files/general_chemistry_1_review.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_off00009956.bin
fe3964abcf12bdb57102511bb2616d04bb62811d7ff5858d023abf0e5d389fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9956 5088 bytes
font_01_sfnt_off0000aad9.bin
6edc2a8d2f1cc54eb77cbac23223defb09f006902bb1eb22ff42c3282f88cf2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD9 10384 bytes

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