Malicious PDF — malware analysis report

Static analysis result for SHA-256 28eb2cefb7226afe…

MALICIOUS

PDF

34.1 KB Created: 2020-08-15 18:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b26d89fcb58ed3bd7a7d4ecd8e199197 SHA-1: 3cac112fbb8a8a11bffca8d6d40ed0455a87e726 SHA-256: 28eb2cefb7226afe912e19f6a8e1d28d3515ca3e70fdf6140cc83bfe4212224c
150 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 of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/wb?keyword=morgenstimmung%20noten%20klavier%20pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious content. The presence of numerous other links, many hosted on Shopify, further supports the 'link farm' heuristic.

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/wb?keyword=morgenstimmung%20noten%20klavier%20pdf
    • http://files.jazzlegaspi.com/uploads/1/3/1/4/131406086/tisinetafolulaxas.pdf
    • http://files.cardillelab.com/uploads/1/3/0/7/130776526/tosotek_norezanoxef_ziraramaxefe_silag.pdf
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/15867423659.pdf
    • https://cdn.shopify.com/s/files/1/0431/5316/2394/files/sapupaxowegotegemijudobod.pdf
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/gta_4_car_mods.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/kexibobogovozupolisin.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/foxinuxagox.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/53918708598.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/wuwotedaropalibenik.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/aws_certification_solution_architect.pdf
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/70403902128.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/90987909936.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/sumexa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6483/3686/files/69657497430.pdf
    • https://cdn.shopify.com/s/files/1/0434/8955/8680/files/razulatakelisisororapilox.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9453/files/xuxibokawedanufifitenelu.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_off00004556.bin
34c017ea080ec797ecd4cb87d584d44762dd60a50cfd6dd3f164e1020afc0a31
pdf-font-stream PDF embedded font (sfnt) at offset 0x4556 5488 bytes
font_01_sfnt_off00005801.bin
e7bab47f699984f7edbf648c3ac7c9fde051da3c2652a1f1678bc07e73191fdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5801 9956 bytes