Malicious PDF — malware analysis report

Static analysis result for SHA-256 42091b5499a308e9…

MALICIOUS

PDF

39.1 KB Created: 2020-08-30 20:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9376910a7bc3f41a028095d3c3973249 SHA-1: 93a1c67da6a455375edf8538879376487c885807 SHA-256: 42091b5499a308e91b7fcd7e5b3173c5b9b84424275b2babff997dc0358c361d
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=cathy+nesbitt-+stein'. This URL is likely the primary mechanism for delivering a malicious payload or leading the user to a phishing page. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute content through a seemingly legitimate platform. No scripts were extracted, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.cc/wix?keyword=cathy+nesbitt-+stein
    • https://static.usrfiles.com/ugd/b8c837_62ead4b5d7db4e8381977a53c9133e96.pdf
    • https://static.usrfiles.com/ugd/2f07a1_cd4dcaee8367409abef10e1e0b312ad8.pdf
    • https://static.usrfiles.com/ugd/b8c837_62de667f83a548d18f15d58114afdbd6.pdf
    • https://cdn.shopify.com/s/files/1/0428/9809/6284/files/93916371222.pdf
    • https://cdn.shopify.com/s/files/1/0463/4640/4002/files/98216511326.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/zoledokomet.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7787/files/conclusion_scientific_report_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/electronic_bridal_shower_invitation_templates.pdf
    • https://cdn.shopify.com/s/files/1/0460/1872/3999/files/58161321624.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/account_reconciliation_format_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0457/8403/9590/files/tcp_ip_sockets_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/vivurerobumagu.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_off00005996.bin
3b732472718da9cefd51a7c45a60c1fa1496c80846f68942455e576c6060abf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 4824 bytes
font_01_sfnt_off00006a03.bin
690c6fd7d37624f0a8562af480431af0a9bc9ad41b39bcf5286cb2a3e72d77a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 10788 bytes

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