Malicious PDF — malware analysis report

Static analysis result for SHA-256 2187fb7f97b0ffe4…

MALICIOUS

PDF

42.8 KB Created: 2020-08-31 07:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1f86a4a0871686608aed2b2189cb76 SHA-1: 710db4ad097a41a40c00bb07b0de035eb680a903 SHA-256: 2187fb7f97b0ffe4c84c589c237a9698f6986d82335f2f08a1966c54a2cffe89
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=cockapoos+for+sale+in+az'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. No scripts were extracted, limiting the analysis of further payload execution.

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.cc/wix?keyword=cockapoos+for+sale+in+az
    • https://static.usrfiles.com/ugd/b8c837_fdf5f146ca094003854c4e8304bba7de.pdf
    • https://static.usrfiles.com/ugd/b8c837_155ba0f02f494e728781041923348362.pdf
    • https://static.usrfiles.com/ugd/b8c837_a573635522b04c1a9b154a6f71eb4ae0.pdf
    • https://static.usrfiles.com/ugd/f55bec_8279c33ce18b463ba9f0fa1af8683062.pdf
    • https://static.usrfiles.com/ugd/ec0c41_47b395d66fc34f03bd6ce997a8bf3c92.pdf
    • https://static.usrfiles.com/ugd/b8c837_574478db8c164d8684529770df75ca34.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9247/files/dutudix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdf
    • https://cdn.shopify.com/s/files/1/0460/7839/4532/files/xulol.pdf
    • https://cdn.shopify.com/s/files/1/0466/3027/3189/files/gracie_combatives_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/vugutelotewomub.pdf
    • https://static.usrfiles.com/ugd/0bcf16_0a36a4a96eb94f79b8d6aa8dff222ed1.pdf
    • https://static.usrfiles.com/ugd/e4a001_353c45475fb54ed499481a809aa8e258.pdf
    • https://static.usrfiles.com/ugd/493135_7c06cf621f6c4e699e5b3c83e1cba57f.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_off00006868.bin
991508dc7b18965d4c691623ebdaa7814d482fe3bfcdf6888307b1afb500c608
pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 5028 bytes
font_01_sfnt_off0000799b.bin
dc9b13da81530bbae7fefc67ca67e5b92e4772a07374d02dd3b643a5abb41aab
pdf-font-stream PDF embedded font (sfnt) at offset 0x799B 10728 bytes