Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6feca2835780852…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 16:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f8edf4d99f1c9c83b0b1eb42783f801 SHA-1: 34ee0cb8c1986882c5031ad5bff20ee86f48f134 SHA-256: b6feca283578085239ead863653c573661041bac913cacc9722caf734357b7ce
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords related to an 'immunisation schedule', suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector or to distribute further payloads.

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=immunisation+schedule+qld+2020+pdf
    • http://ditel.gailwisdom.com/uploads/1/3/1/8/131871674/8447056.pdf
    • http://files.thunderroadrunning.com/uploads/1/3/1/0/131070979/9155614.pdf
    • http://files.lovemehemp.com/uploads/1/3/1/3/131378950/pemuvitovik.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/59863615631.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/nixexininavutonij.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/pagimezagojir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/tifepukuvesanafabopodetil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/daniruboxipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3611/4076/files/zupilopitexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/43390100827.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/telephonic_interview_conversation_example.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/53639172160.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.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_off00006acd.bin
265fef77bb728122a524b54fce8a20039211b199aa645b54e92761cb4bcde184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACD 5636 bytes
font_01_sfnt_off00007dcf.bin
74fd381f34ae31c82821146fc9f16df7ac500b08485c2c88691a32855722a5d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCF 10324 bytes

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