Malicious PDF — malware analysis report

Static analysis result for SHA-256 939a98b31be2258e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 00:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8661086f7fc73a485a298284c74fdf0 SHA-1: 04fc3ba4ddd8261df381e954be35e629d1281ae2 SHA-256: 939a98b31be2258e7a8d6071a5e5960f4b529ea75610c4eee5a5b66916c80343
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same URL found in the heuristic, suggesting it's the primary lure. No scripts were extracted, but the presence of a malicious redirector indicates a phishing or social engineering attempt.

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.com/pify?keyword=us+flag+patch+on+army+uniform
    • http://files.arnhemfallenangels.nl/uploads/1/3/1/4/131437949/faburizedavarobuj.pdf
    • http://files.mandmstage.com/uploads/1/3/1/4/131453733/ramegafoxe.pdf
    • http://nejetuzex.travelinterri.org/uploads/1/3/1/6/131606420/gifejisik.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/18355590578.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2392/files/47723777534.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/33430650221.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/76885181237.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/capital_market.pdf
    • https://cdn.shopify.com/s/files/1/0436/5726/5305/files/votogobewefaxagavuroxer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/duwarexuvej.pdf
    • https://cdn.shopify.com/s/files/1/0438/4810/6134/files/sagazutukani.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/dugutovegekomavizufi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ed.bin
433579234addf8cd101906651496d04faabd981a3c5961642ee7a39f65a16d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67ED 5520 bytes
font_01_sfnt_off00007a8c.bin
a23b1c0dbfa1ca1fa72cac5a74d5ab677824a6bc0cf6e39b2097f62ea86b2fb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 10088 bytes

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