Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaca854a3e399b8…

MALICIOUS

PDF

42.5 KB Created: 2020-08-03 19:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a887b959f219df928a14cf9e41a875f SHA-1: c8ee16255553b0059fdc13435765ede0f8c4cc3b SHA-256: eeaca854a3e399b86c44d20aec91ddaac50f2d4e206238477f8b9c34d68e39cf
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=affirmative+action+in+the+workplace+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to malicious content via the ttraff.ru domain.

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=affirmative+action+in+the+workplace+pdf
    • http://files.gbtransplantcycling.com/uploads/1/3/1/4/131437225/3295315.pdf
    • http://files.penhurstacademy.co.za/uploads/1/3/0/9/130969036/bepibizepepedu.pdf
    • http://files.ladyannyoga.com/uploads/1/3/1/4/131453006/efe2186.pdf
    • http://vidupol.autismsupportgroup.org/uploads/1/3/1/4/131453284/540c4e0f951.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/5285192696.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/waiting_for_other_installations_to_complete.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/91456280695.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5235/files/59260103847.pdf
    • https://cdn.shopify.com/s/files/1/0430/6360/7445/files/46922361043.pdf
    • https://cdn.shopify.com/s/files/1/0431/9081/2821/files/pizejujodazarabozeni.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/23646074111.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/kusilimaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/tevedur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/wevok.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/bozawosusanemimusebo.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_off00006976.bin
acb22cd646db1de05afadfafddddb6d46547d03dfc3dc618cd4efad57ae1ebf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6976 5424 bytes
font_01_sfnt_off00007bd1.bin
313dc2d77fd604555e58110e75a9da38f555c37b16de68fed36491aa2c655ada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD1 9812 bytes

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