Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2396d33870bf78a…

MALICIOUS

PDF

54.9 KB Created: 2020-07-29 12:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55c39e30a063e7ea8e308da50bd5cf99 SHA-1: 7ea7e83de508c17f3d7cd2f6cbc87ea2e53e5078 SHA-256: c2396d33870bf78abebc82e47bd712e54500c19e84994cdcb79d745cdacc6445
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm. One of these links, 'https://ttraff.cc/pify?keyword=bases+matematicas+ufabc+pdf', points to known malicious redirector infrastructure. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests a malicious intent to drive traffic to potentially harmful sites.

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.cc/pify?keyword=bases+matematicas+ufabc+pdf
    • http://files.payettevalleyfoodconnection.com/uploads/1/3/1/6/131637362/1d7854a.pdf
    • http://files.bondybluereview.com/uploads/1/3/0/8/130874122/jalokibo.pdf
    • http://files.vidarthegame.com/uploads/1/3/0/8/130874023/zexokef.pdf
    • http://files.bhspantherplayhouse.org/uploads/1/3/1/4/131437513/bosutaxejolowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/tokofaweb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/vatewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/penalekunolalamudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/wegobur.pdf
    • https://cdn.shopify.com/s/files/1/0428/5733/2895/files/torevipofomujanazomit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/zunomixapewixipozov.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/zaxanedukomote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56346524494.pdf
    • https://cdn.shopify.com/s/files/1/0434/1743/6327/files/zoxulamo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/vozagadabojojiguko.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/33286017662.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/mikizixidugobap.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/27785996404.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000776c.bin
f6f7c110d5c4af484d81b6d930cfbb30229bed317a051358fb29f9fe2c4452b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776C 5028 bytes
font_01_sfnt_off0000887d.bin
e46dc6523a634532b9ee15db74e7256667bebfdc3042db823a242b8b44bfb9ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887D 2788 bytes
font_02_sfnt_off00009479.bin
bc029c716b305b8a163ee5483a4d63683e552d42ed14ee3b2b82c076c282e0c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9479 10732 bytes
font_03_sfnt_off0000b929.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB929 16036 bytes

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