Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5f0f31a7b913db…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 20:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a8d76e6210cc2a7a62a212f554d61b1 SHA-1: 199cdb3c56020e56b43eedded4dfb2b2f9df6512 SHA-256: 2c5f0f31a7b913dbb52d7be4be7d3c7e98f19bb603ad4b6efd2f1e51fa4662c5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs to a known malicious redirector at ttraff.ru, disguised with a keyword search for 'autumn leaves partitura pdf real book'. This suggests a phishing or scam attempt to redirect users to malicious content. 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=autumn+leaves+partitura+pdf+real+book
    • http://files.hospicecareteam.org/uploads/1/3/2/7/132740958/zerezonulum.pdf
    • http://vatugesaw.currantcreekoutfitters.net/uploads/1/3/1/1/131163599/tifozeribep.pdf
    • http://files.menardcountycemeterymd.com/uploads/1/3/0/7/130775837/vokoxun.pdf
    • http://files.vermontcustomfitness.com/uploads/1/3/2/7/132740586/3521859.pdf
    • http://mifujowe.holistichealingacu.com/uploads/1/3/1/3/131398140/7913851.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2894/files/angioedema_facial.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/44396683198.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39646295774.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/84059727536.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/2020_canadian_calendar_printable.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/86943895890.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/nutem.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6581/files/texulovivosubemupegina.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/95557891485.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/pomezadelinemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.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/
    • https://cdn.shopify.com/s/files/1/0433/06

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006594.bin
659d574c4477ee5f169114607a9a24768744b7bb116d4d7f115b5a79558c3bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6594 5440 bytes
font_01_sfnt_off00007803.bin
5166f9c1c4a61d503da5028318aeb5bd1b91f3df230f8559de02ea723876b65d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7803 15560 bytes

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