Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d915950defb032f…

MALICIOUS

PDF

60.2 KB Created: 2020-08-31 19:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b818cea7d8ab0f17784b3785e975de71 SHA-1: af2ce558734d40b89b0444307caa4d2f1067b053 SHA-256: 8d915950defb032ff0211bc0c37db8537cec16f4209bb33d0bfb4688b87a58b2
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is ttraff.ru, which is known to host redirectors. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. No scripts were extracted, limiting the analysis of specific execution behaviors.

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/wix?keyword=nomenclature+of+bicyclic+and+spiro+compounds+pdf
    • https://cdn.shopify.com/s/files/1/0465/0205/1998/files/morurizixotugelujevenopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/47079969967.pdf
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/94439122092.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/19618851610.pdf
    • https://static.usrfiles.com/ugd/32777b_b5d5e57fac6a41d99f3dc9ad1b729bd9.pdf
    • https://static.usrfiles.com/ugd/384ea4_83f73c3ff2574371bf78494878994b66.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb3e57e73b34600926a1f02be3caadf.pdf
    • https://static.usrfiles.com/ugd/4f270c_59622594721d47379511ccddb54f4292.pdf
    • https://static.usrfiles.com/ugd/b8c837_6095cd605a4b43bca7bb6f59728d8c0f.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/xamenoxolamu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/tigapemege.pdf
    • https://static.usrfiles.com/ugd/362633_c4b9c108361f4d77a792f7d550901985.pdf
    • https://static.usrfiles.com/ugd/51c472_f59e10f7b1e146cd9e9c0e33f3eb6157.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff8fc0a5d54a477b934dfb077d2d202c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d32.bin
6328b1eccbb2c8ba8068f9de02f405972508c24e893f0035e1e0e02dbeeb2116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D32 5396 bytes
font_01_sfnt_off0000af6e.bin
4e008d2580160be11c8eee883c3834bfbca678200338ad55e535490c25ce25be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6E 11088 bytes
font_02_sfnt_off0000d546.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD546 4324 bytes

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