Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d92c4188fdf6b62…

MALICIOUS

PDF

44.8 KB Created: 2020-08-25 07:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5eedbf0c481b6a4884f08c0d665eca9 SHA-1: 0cb83d1260f1c3e6c5718f744a5f075f4d3ba77e SHA-256: 9d92c4188fdf6b62f89c238038098b408f3d5d9783c6f38d9c34174223ae156e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, also contains the malicious redirector URL. This suggests the document is designed to trick users into visiting malicious infrastructure, likely for further exploitation or credential harvesting.

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=combining+data+from+multiple+sheets+excel+2013
    • http://rururej.ggbarry.com/uploads/1/3/0/7/130739616/ronofozari.pdf
    • http://files.neilmccarthypoetry.com/uploads/1/3/1/4/131453990/6f8bbc.pdf
    • http://files.wellswoodcivic.com/uploads/1/3/0/7/130776268/9676318.pdf
    • http://files.industrialsoils.com/uploads/1/3/2/8/132814342/414592.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/box_plot_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8807/files/definisi_atonia_uteri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/bourbon_trail_map.pdf
    • https://cdn.shopify.com/s/files/1/0439/0780/9448/files/21664835053.pdf
    • https://cdn.shopify.com/s/files/1/0436/3229/6089/files/euphemism_examples.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/jalusoxusekageta.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/705904397.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/nest_learning_thermostat_installation_guide_uk.pdf
    • https://cdn.shopify.com/s/files/1/0436/6820/9817/files/zixafan.pdf
    • https://cdn.shopify.com/s/files/1/0429/0894/2499/files/xekela.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/64043740928.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/gezize.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/40609462319.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_off00006e21.bin
e1ac7699a85844f035fa078abc3c51a557ca0c96c47aed2cfc959db65deef1a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E21 6172 bytes
font_01_sfnt_off000082fc.bin
e99876515afb9b724897601d031b6f7daeea429ae187cec1142ea12a7ee7d196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82FC 10208 bytes

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