Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f844f5648bdac0e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 17:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 704d85efbda752b3fe8aa012b5680244 SHA-1: 30db6f1613d6a42e17763a8284bfe0e5683061fe SHA-256: 4f844f5648bdac0e787081d6abf1e6560541890a4bd851ad8c6e9ced56ee9ff6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=reporting+spss+anova+results. Another heuristic flagged the document as a PDF link farm, with numerous links to PDFs hosted on various domains, including several on Shopify. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=reporting+spss+anova+results, suggesting the primary intent is to redirect users to malicious content.

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=reporting+spss+anova+results
    • http://files.phoenixnyteachers.com/uploads/1/3/1/6/131607522/bakobawafifiw_vijoralaw_minamudawimefa_nedune.pdf
    • http://files.cornerstoneuk.org/uploads/1/3/0/7/130739081/jegutokajulasusesepa.pdf
    • http://files.missinternationalaustralia.com.au/uploads/1/3/2/6/132683140/6372502.pdf
    • http://files.teviasa.com/uploads/1/3/2/7/132741225/4959704.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/vozebulufona.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/21940084023.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/22099271538.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/20801707235.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/geometric_distribution_function.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/tomeruponeguxodajezovesib.pdf
    • https://cdn.shopify.com/s/files/1/0439/1161/0520/files/91489117133.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/fuwizumedin.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_off00005f6c.bin
b0616dd4f9d8a75554fa2865405a40d495e133d32f6e63769eea05d5f04719af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6C 4936 bytes
font_01_sfnt_off00007053.bin
e596272125d57f9ebb8c811336622fcb20dd0bd13d56710fa6bf0b0a9eae1a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7053 10008 bytes
font_02_sfnt_off00009290.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 4324 bytes

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