Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eed3dbf1bf161f6…

MALICIOUS

PDF

43.0 KB Created: 2020-09-10 02:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5ca0ad290bbe711eba1a7446d467429 SHA-1: f5542fabf07e0200fab809381d760b7e6030c666 SHA-256: 7eed3dbf1bf161f6152d1ef86fdb2deb8f33f06955982b8009faabf9de77ae92
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to a 'creditedge user guide'. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is designed to lead users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=creditedge+user+guide
    • https://static.usrfiles.com/ugd/912de2_69aeed0729504a14af0c2e3fab381820.pdf
    • https://static.usrfiles.com/ugd/b8c837_341c009ad4dc49fa968a60bcb5cf96e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22cdb9f5e104815a60ba5cfedbbd167.pdf
    • https://static.usrfiles.com/ugd/26481d_11c53fd1d6aa46feab5fe93e43bfb7ca.pdf
    • https://static.usrfiles.com/ugd/87a178_7f60d5a5d5a140bdb73b3ff4e5bfa1a2.pdf
    • https://static.usrfiles.com/ugd/3254bf_4cadaf97a4674d65a4b531eab526ddaf.pdf
    • https://static.usrfiles.com/ugd/8ebb60_d79dbeebdb5e4a8b9816975131dd34df.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8bb3b6efe8d4c31b864064d81324398.pdf
    • https://static.usrfiles.com/ugd/e5412a_84ce358296b745b3880d6b8a7949efd1.pdf
    • https://static.usrfiles.com/ugd/8ebb60_ad62e1c9f11e48b8aba0d8fa1e27dc0e.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/fakofuromilos.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/poxafojoro.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/61135642561.pdf
    • https://static.usrfiles.com/ugd/5bb01c_038a0de32d5845c79cc3667c29f8e449.pdf
    • https://static.usrfiles.com/ugd/dad90e_41e328d41d2548b9b6c9679a9e5b1b89.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_off00006ae1.bin
b554e7bcfc51fc904d5e6cdb08216e4a12836c37da511c9c3c1facb2c84e07f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE1 4656 bytes
font_01_sfnt_off00007ac6.bin
2dbfaf7bfc97ca18377f7cb41b566d442e8d2ebaec9c18cd818b5b77c7b5e8e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC6 10684 bytes