Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda445e2981c59f6…

MALICIOUS

PDF

56.2 KB Created: 2020-08-23 00:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af20720ed3408efe7bfe24ab5b2d4446 SHA-1: 63b022108c4da60b6b152e8368862af36142ecbc SHA-256: eda445e2981c59f6d288068ddf72223ee8703be1eb01cb2f4ca2c6d39aeb0726
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.ru', are likely part of a campaign to lure users to malicious sites. The document body, though heavily obfuscated, contains the same URL as the malicious redirector.

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=altar+de+muertos+elementos+pdf
    • http://fuzoj.jwalarejimon.com/uploads/1/3/1/3/131381241/3634195.pdf
    • http://files.tophatdesigns.net/uploads/1/3/1/3/131383892/zaziputo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/51401308167.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/72320908122.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/lebosap.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/37073991568.pdf
    • https://cdn.shopify.com/s/files/1/0436/9684/9051/files/35256165118.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/munoxujujad.pdf
    • https://cdn.shopify.com/s/files/1/0436/3019/8937/files/77253884526.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/87755408907.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/19120341603.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/15678754643.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5958/files/nimazonadosigofadutawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/26946842155.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/
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/723209081

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009bca.bin
606c63ab05a89caa67aef73a7a54d4ca0d2419cff41d5d6f6c009612cc942363		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCA 5176 bytes
font_01_sfnt_off0000ad46.bin
83b4084a9586a3b85969586e9c67e6bb6e3d96a9d3dade64b3de7fca80198404		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD46 11304 bytes

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