Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d417850757c03a0…

MALICIOUS

PDF

38.3 KB Created: 2020-08-21 20:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5048fcea4f799c6a8b94a2e58a29cd2b SHA-1: 0a82b9a3b3439a3ace586922c672330a563cf121 SHA-256: 1d417850757c03a0c16c400771d212efee5998e881c146ff2635bc5f8cf0e478
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on various domains. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=terraform+aws_s3_bucket+policy+file, which is likely intended to lead the user to a malicious site. The presence of a link farm suggests an attempt to obscure the final malicious destination or to leverage SEO techniques for distribution.

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=terraform+aws_s3_bucket+policy+file
    • http://voler.cmbuilders.org/uploads/1/3/0/7/130775432/5052861.pdf
    • http://lujanuna.iconiacapital.com/uploads/1/3/1/4/131453133/e98f73031d.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/joripatofovupogekulimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7320/0537/files/sba_personal_financial_statement.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/bijipef.pdf
    • https://cdn.shopify.com/s/files/1/0434/8166/1600/files/19973289233.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/mentoring_minds_math_level_3_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/87288571657.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/curtis_ryan_honda.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/cantoral_liturgico_san_pablo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7101/9935/files/gifutowinasu.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_off00005765.bin
2021bfcd180d12c91bdf5b40d4720956ca43e4645c3d7cc605f0d11e49535c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5765 5704 bytes
font_01_sfnt_off00006ae4.bin
6e771b061e12fac16f3eb56ef6f6d7910fae24b2d8b37b1de03f6fb5030b464c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE4 9924 bytes

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