Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b28d3d73ad01f3…

MALICIOUS

PDF

44.7 KB Created: 2020-08-23 21:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b010592698c6ec15b4aeada87c91eb1e SHA-1: aaa586e54f3f3a6a36c790ebb8d4b5b6e5403811 SHA-256: d2b28d3d73ad01f3bbb9ae81cc637807efaa784f4a749e642db8ad52696dd400
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a reconstructed URL that appears to be part of a link farm designed to manipulate search engine results. This suggests a phishing or redirection attack aimed at leading users to 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.ru/pify?keyword=centre+de+formation+juridique+enm+avis
    • http://files.locksmiths-st-louis.com/uploads/1/3/0/8/130814596/815632e35ab.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/38061747810.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/balutoxusizojemusewojubex.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/31064920866.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/98517979341.pdf
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/93968845931.pdf
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/astronomy_for_beginners_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/84768833574.pdf
    • https://cdn.shopify.com/s/files/1/0434/2064/7576/files/nakatiketomukuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/5657/9228/files/99895391613.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_off00006bfa.bin
4da016642d294b9340816b8c71bd077572bca83d9da7d5e6dd434541b8cea87c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFA 5188 bytes
font_01_sfnt_off00007d8c.bin
fb40a5fd34cd0fe07ee527661aafb59d645fc22fa1d4601e720e48f32c0bce2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 12340 bytes

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