Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ce5347730646bc…

MALICIOUS

PDF

41.8 KB Created: 2020-07-27 17:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf970d42f200db2c885b407f8e897b3d SHA-1: 9020e2764338a4acc481aa15f78f565924933226 SHA-256: d4ce5347730646bc4c66ed41555774cbbe58c1b0a5d7a9427ae38de089b2c879
150 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'Boss katana 100 manual' and leverages a link farm of 16 PDF files hosted on Shopify. The primary malicious indicator is a link to the redirector 'https://ttraff.ru/pify?keyword=boss+katana+100+manual', which is flagged as malicious. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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.ru/pify?keyword=boss+katana+100+manual
    • http://files.myhoustonprobate.com/uploads/1/3/1/6/131606405/vabozikonidez.pdf
    • http://files.labcharter-pto.com/uploads/1/3/1/3/131379434/4b32ad6.pdf
    • http://files.journeyliving.org/uploads/1/3/0/7/130738974/dojedewa-debibatut-kamemidu.pdf
    • http://files.curiouscata.com/uploads/1/3/2/6/132695517/50aa256483da.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/89614496696.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/80118991398.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4068/files/nesaduf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0437/8470/0055/files/92617453276.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/8374887146.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/86149516753.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/5916006956.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/miguxudifotujarijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/notazol.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/34799834536.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_off00006766.bin
ff78ba26fc93499168d4c18385d0cee988ab86224ba807080245192c7417fbc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6766 4760 bytes
font_01_sfnt_off0000777b.bin
5927c8384094ba0e9be24e02cbe73a6805b1eb6a9115cddaedcac48981c3d960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777B 10164 bytes

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