Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06893b6c02afbea…

MALICIOUS

PDF

42.6 KB Created: 2020-08-09 13:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fe75f6e1c0d920bc3f270fc78b5feb2 SHA-1: 8ea250aa1e11b303dbaca78539e24a06fa40eccd SHA-256: a06893b6c02afbea6f792f5b0796bcad5247f5f340d00eb9962f21568b65dce0
120 Risk Score

Malware Insights

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

The PDF 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, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the target URL and other PDF links, suggesting a link farm or redirection strategy. No scripts were extracted from this sample.

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=chronic+pancreatitis+guidelines+2020+pdf
    • http://files.gillpolo.com/uploads/1/3/2/3/132303083/4075210.pdf
    • http://files.emasullivan-bissett.com/uploads/1/3/2/6/132681477/f8bb730fa151.pdf
    • http://files.wbmconference.net/uploads/1/3/1/1/131164573/7c5bb8b31c.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/performance_review_phrases_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/lirikolopowevipujoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/koluxusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/gurajinunofuritirolitoje.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/52472915283.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/49203308883.pdf
    • https://cdn.shopify.com/s/files/1/0428/8629/9815/files/41185704476.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/bifevuvilejitimafinoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/nesek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejodogidevetakuranuwa.pdf
    • https://cdn.shopify.com/s/files/1/0439/4277/2891/files/ruvamigetoromobuki.pdf
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/pumunerawexikoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/ligasupu.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_off00006627.bin
4bde24026c20bb8377b62184c59f79111cb7ad78157ed007566713329e867e04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 5596 bytes
font_01_sfnt_off00007924.bin
ce2cffdcc47ed8f0d650c91c7baa2877de142a88d53f93cc4beb3d2038913863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7924 10536 bytes

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