Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42d6c5d89a86c82…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 14:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb1f9f118ff4a502b08d5f43fbb6bae2 SHA-1: def06c5963e61959766e0af991cb4dcfdb6a9e2c SHA-256: c42d6c5d89a86c820a8860141d516b70675f155ded89cf5b329873fef6e57969
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One of the primary links redirects through a known malicious redirector, ttraff.cc, suggesting a malicious intent to lure users to harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was largely unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=android+action+bar+add+back+button
    • http://files.tallearcompany.com/uploads/1/3/1/3/131383456/jazuzenepe-jovugidope-bobolipa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/call_of_duty_1._0_8.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/rebamusezomaduv.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/73721443063.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetidolurat.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/segimaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/kejodufikodajitida.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/xalabujeve.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/64680486595.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/giboxig.pdf
    • https://cdn.shopify.com/s/files/1/0434/0085/5706/files/dawimi.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_off000061d4.bin
f56529a0f35307f983f732031d5438f5903dbf78477988884e8e657fe45c5a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D4 4916 bytes
font_01_sfnt_off00007297.bin
b240b7bf6223bbca90507471eaf203350f24a9c6383e5ed64037aafb4b611ddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7297 10068 bytes

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