Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ed7776dc00c3d9…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 07:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06864991461cf1b9028fb4ba3986c3fe SHA-1: 45df93b40a45f0991c392056dad280948992efa5 SHA-256: c9ed7776dc00c3d9084f7d1a077c87adb086b38f51503e80371ab698827f7539
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=ambari+video+song++free'. This indicates a social engineering lure, likely attempting to trick the user into downloading further malware or visiting a phishing site. The document body, though heavily obfuscated, also contains the same URL, reinforcing its malicious intent. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm for SEO poisoning or distributing malicious content.

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.com/pify?keyword=ambari+video+song++free
    • http://rebikasez.baieslings.com/uploads/1/3/2/3/132302842/a6a58cc.pdf
    • http://files.goodshepherdseniorapartments.org/uploads/1/3/1/4/131453733/4ded372e.pdf
    • http://zexaje.stmark.blog/uploads/1/3/1/8/131856145/retelepenetot.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/36735456915.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/gedavebefuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/29236759537.pdf
    • https://cdn.shopify.com/s/files/1/0434/4899/1910/files/perenodugeruvu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0771/2155/files/42491782039.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/zibumojedopozev.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/755849838.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/60749899029.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/17688105360.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/57569003970.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_off000056a2.bin
d7f5206bb07afeb35559325a1b9e6ac3e64e0b9b1be07d55000c18eef032087b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A2 5384 bytes
font_01_sfnt_off000068d9.bin
b60cf7b4b2ae5c2806d6c72cf45fc4a40f54c76b7a141a428b25186d90280bea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D9 14780 bytes

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