Malicious PDF — malware analysis report

Static analysis result for SHA-256 4475d82826dcc53c…

MALICIOUS

PDF

47.9 KB Created: 2020-08-29 20:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 755a556392cbf3cd330b8db65a2cd278 SHA-1: 24d5f8485d2c594e61445d604e6157627382b304 SHA-256: 4475d82826dcc53cec570955cc8ad128108f760a78c2876ca3b05181f0bfdebe
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains text suggesting it is a business finance PDF, likely a lure. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content. The presence of numerous Shopify links, while mostly benign, is characteristic of SEO link farm techniques used to obscure 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.com/wix?keyword=multinational+business+finance+fourteenth+edition+pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/42427469539.pdf
    • https://cdn.shopify.com/s/files/1/0439/9818/3582/files/18290795453.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/cestodos_veterinaria.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/simple_things_miguel_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/parallel_lines_and_transversals_worksheet_echalk.pdf
    • https://cdn.shopify.com/s/files/1/0429/6530/3455/files/lesuvifizike.pdf
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/american_college_of_orthopedic_surgeons_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0453/8921/7960/files/obc_certificate_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/37078650025.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sivuduveserekolagaxabulux.pdf
    • https://static.usrfiles.com/ugd/b8c837_331ad7e87edc4c14a3869fe8a9245b56.pdf
    • https://static.usrfiles.com/ugd/b8c837_68a0f57776cd4fff9c020f98b8c7fc41.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_off00007c38.bin
917f03f722736a555c01810f7243ed4a010dc153e1aab700480de69b083e10e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C38 5388 bytes
font_01_sfnt_off00008e84.bin
b6522ad0ad679696207fbe10528e1617a9524008817b62d6d4df1a832e4ed058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E84 10656 bytes

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