Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3051ee7615299ee…

MALICIOUS

PDF

48.3 KB Created: 2020-08-19 20:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81563d4de58ffdc9052fee449f1e05b1 SHA-1: 596f29c6a55a8452a8c9c1d4fb7e625b2e78b1ec SHA-256: c3051ee7615299eee5ff8cbad54a6e128d7ab8997d7ae0ceaccf814fc8533665
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=graduate+engineering+cover+letter+template', suggesting a lure to disguise malicious activity. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a phishing or social engineering attempt.

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.ru/pify?keyword=graduate+engineering+cover+letter+template
    • http://files.herbalist-thehealingearth.com/uploads/1/3/0/8/130874683/5982634.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/30302263611.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/saruw.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/41590810124.pdf
    • https://cdn.shopify.com/s/files/1/0446/0979/8307/files/accident_report_writing_training.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/lipofuscinosis_neuronal_ceroidea.pdf
    • https://cdn.shopify.com/s/files/1/0428/3554/2182/files/50046945193.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/91769613945.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/fubigawisaxika.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_off00007e89.bin
bc8cfcca9c49ca85e35a72c1c4d07fa0e3856c6b484213d632ef8e633388642a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 5304 bytes
font_01_sfnt_off00009089.bin
5753df9ac94c9762a0998aedb4787908ea90ac915cc29e7f4a2be3938583e779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9089 10648 bytes

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