Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e43dbd9b3abb39…

MALICIOUS

PDF

66.9 KB Created: 2020-07-24 14:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aad3745f76bb2f98a29d99f5473bde7 SHA-1: a86e2e53480d28f119fb11ed6bc5fa524c1b5282 SHA-256: f7e43dbd9b3abb3966e03b6f24b2e3c48733b7f6d1b496b3f691f466d855ab59
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm pattern, with numerous links hosted on Shopify pointing to other PDF files. The embedded document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, suggesting it might be a generated document. The primary attack vector appears to be luring the user to click on the malicious redirector URL.

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.com/pify?keyword=markdown+cheat+sheet+new+line
    • http://files.danathebird.com/uploads/1/3/1/4/131438046/8498593.pdf
    • http://files.johnbeswickfurniture.net/uploads/1/3/2/8/132815343/083ae4.pdf
    • http://files.brookfieldcoc.com/uploads/1/3/0/7/130775441/roserenowujasar-welekir-ledosit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/lumakozuwedevasasibiner.pdf
    • https://cdn.shopify.com/s/files/1/0437/3377/8597/files/lunilutitunerunizunexebep.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/rixew.pdf
    • https://cdn.shopify.com/s/files/1/0435/2753/6799/files/41078143176.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/26320772317.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/bejusadugogupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/40641534560.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/44318620681.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/41005139131.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_off0000ba99.bin
95d03a4a062a3534265aef7ec6b4819e7b43a05b0285e72efef2ac760c249719		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA99 4976 bytes
font_01_sfnt_off0000cb89.bin
ed65f46b247cf120c6936a3e1e94530c08dd423306a674caa1663332b72b0d04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB89 16348 bytes

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