Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d2c80e46d5393b…

MALICIOUS

PDF

55.6 KB Created: 2020-08-29 13:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f28fdc2282956255a9373c13248a337a SHA-1: ff6ccc17af9d378f95f867a2f6ee3535a87226b8 SHA-256: 41d2c80e46d5393b1b5e0e1256723d9f900296da286999484ddd2169491a2ebb
152 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a deal for a Kindle Fire, which redirects to a malicious URL (ttraff.cc). This URL is flagged as a malicious redirector. The document also functions as a link farm, embedding numerous external PDF links, many hosted on Shopify, likely for SEO manipulation or to obscure the primary malicious destination. The ML classifier strongly indicated maliciousness.

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=kindle+fire+3ht7g+price
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/general_characters_of_bryophytes.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/accounting_for_managerial_decisions.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/41622089423.pdf
    • https://cdn.shopify.com/s/files/1/0463/3853/9682/files/wolajixizure.pdf
    • https://cdn.shopify.com/s/files/1/0438/0049/4237/files/82245530629.pdf
    • https://static.usrfiles.com/ugd/b8c837_1779f72805b5484d8595fa4a2d796370.pdf
    • https://static.usrfiles.com/ugd/b8c837_af8eda0d32b644e186422fd064f3f59d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad3664f75d21438c9aca8596a88ec93b.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/xesibavominazigunava.pdf
    • https://cdn.shopify.com/s/files/1/0433/9594/0519/files/77350475767.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6465/files/sawudebituvamituzafoze.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5c39ae288aa48338b4977a89dcd2e02.pdf
    • https://static.usrfiles.com/ugd/b8c837_94283133bc734ca2853e7868c2078e9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba583d41c11a41e580bb52d87c529493.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_off00008e80.bin
424f177b69b4d2fc37551d63001d0a82a4fde19b01e426a6b87891eef2dfaf53
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E80 5244 bytes
font_01_sfnt_off0000a059.bin
63652ec0af6f9fc3ae77f24d4f7d3f4911e5ee82203e19c04e3098d31c32dece
pdf-font-stream PDF embedded font (sfnt) at offset 0xA059 16052 bytes