Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf0f220fea9270e…

MALICIOUS

PDF

42.8 KB Created: 2020-08-10 07:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb12b53542e0843600aa5f9db4b00fd8 SHA-1: 335342818eebbcea2f06d476321efaa02acb825d SHA-256: baf0f220fea9270e7b2cc7cd29bc62e071d6366c7932e7d3c4b5c5f9fe7999d3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection attempt. The primary URL, 'https://ttraff.cc/pify?keyword=que+es+una+caldera+industrial+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or obfuscated, but the presence of the malicious URL and the link farm heuristic strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=que+es+una+caldera+industrial+pdf
    • http://files.bondiandeasternsuburbstheatreco.com/uploads/1/3/1/3/131397987/8614734.pdf
    • http://files.erinreneesews.com/uploads/1/3/2/6/132682655/5905137.pdf
    • http://files.terrytown.org/uploads/1/3/1/4/131453291/vavasoxox.pdf
    • https://cdn.shopify.com/s/files/1/0432/0716/4064/files/48251713622.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/plantillas_del_alcance_del_proyecto.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/drdo_ceptam_09_tech_a_previous_papers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/wuwixeviki.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/rimipoxetit.pdf
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/upkar_reasoning_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/14236150431.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/44916610486.pdf
    • https://cdn.shopify.com/s/files/1/0437/5789/5831/files/pijefavoxojimigojofed.pdf
    • https://cdn.shopify.com/s/files/1/0438/4584/5152/files/7771211421.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8541/4056/files/27332171750.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_off00006756.bin
213e88bda261f81f4988be071c413a833288d7cbbf6709bbb8e7c80e61769b8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6756 5212 bytes
font_01_sfnt_off0000791c.bin
c4ca86e574e5eebc4a86078d1394c11aecad2fc4882ac0cc242ee7abb8958e5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791C 10924 bytes

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