Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4b7d6f61a838f5…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 01:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e37c9f994f79977cb221b2d953f10bd SHA-1: 41e67905b9bf271174f5915f5628c5365d7d1645 SHA-256: 4b4b7d6f61a838f55c4af6e8b1fd3b66d5624f3d91708731b6df769d65e609f9
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body itself is heavily obfuscated but contains references to 'odt to pdf' and the wkhtmltopdf tool, suggesting a lure to convert documents. The embedded links likely serve to direct users to phishing pages or download further malware. 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=odt+to+pdf
    • http://files.bearlymade.net/uploads/1/3/1/6/131606453/nonofuxakobegesez.pdf
    • http://files.bridgewaterdairy.com/uploads/1/3/1/4/131438079/66540c5.pdf
    • http://files.beautifulfacesbyerin.com/uploads/1/3/1/3/131380440/bfe120e.pdf
    • http://files.clatchetproductionsllc.com/uploads/1/3/0/7/130776312/3911227.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/40175233667.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8916/files/96546729316.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/54680098868.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/12115177458.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7253/files/witisilose.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/39688217574.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/21780448627.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/xepunokivunusi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/whirlpool_quiet_partner_ii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/xubikovagekiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/55061407308.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005891.bin
0e0fd9c1eb4ed72acf3e1c6e719f71b198a0efda7e3a15c57eded6c843129063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5891 4544 bytes
font_01_sfnt_off0000681d.bin
c36093e6e80c6cfa014cb12faa2f1c49c76139933f21e73804f22f43269d3a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 15128 bytes
font_02_sfnt_off0000912b.bin
75fb5eda6c80430b94b20cb0daa906e0e98a9f633c3ecfcf71c743d7414a59fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x912B 16076 bytes

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