Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bcbc40a52d41ef…

MALICIOUS

PDF

46.6 KB Created: 2020-08-28 12:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aa90a49bdaaa7f1d151cea8e3c240f1 SHA-1: d499590e27496107817d63f7bdef0dfd0fcf08b5 SHA-256: e8bcbc40a52d41eff19ce312dc128ff5f3bf13e506397d8afbc9916f6fd132a2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic indicating it links to a known malicious redirector, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and references to a fitness program, suggesting a lure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many pointing to Shopify-hosted PDFs, which is a common tactic for SEO poisoning or distributing further malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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=buff+dudes+12+week+program+reddit
    • http://files.lambdasigmaphi.org/uploads/1/3/0/8/130814342/rutaromazuses-wolewafes.pdf
    • http://files.alexandramarin.ca/uploads/1/3/2/8/132815008/5b2a5.pdf
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/15560960765.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/minonuxewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/liberalisme_di_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/17665580526.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/wapopogevejaxerun.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/97755247683.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/bukesonudeganigidibel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/14391307686.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/kavoniwev.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/the_great_gatsby_anticipation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0447/7688/2327/files/boolean_algebra_calculator_project.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/logopuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/free_chrome_extensions_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/50787161906.pdf
    • http://buffdudes.blogspot.com/2014/04/buff-dudes-12-week-plan.htmlI
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ad.bin
6bfed8dc4a7a1652b4956416b1ebf3f2a45d7a4a75fc17708b7e58687f5826c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53AD 5496 bytes
font_01_sfnt_off00006689.bin
5c44feb8897bbbe15ef55590c0489bded88debd664e6f08de960d3968f08f16d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 9856 bytes
font_02_sfnt_off00008881.bin
4354bd37e85197a997b2f6c8c8698034d2711068b41d1b66819094364c364bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8881 16544 bytes
font_03_sfnt_off00009ec5.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC5 4324 bytes

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