Malicious PDF — malware analysis report

Static analysis result for SHA-256 c480ce4a1fbb983f…

MALICIOUS

PDF

46.2 KB Created: 2020-07-31 06:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b39bcd2d730465fa8665f4d8bd787b89 SHA-1: 0982993ad5b4f1d060bd97b6e33325ebabbd9b6a SHA-256: c480ce4a1fbb983f0e017bb769972cd25dbac97d845825f2de0b2f04aae68903
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector.

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=wimbledon+2020+bracket+pdf
    • http://files.investinginethnicity.com/uploads/1/3/1/3/131380895/xejiduwit-kesilo-pebaximezog.pdf
    • http://files.spiritofhopefoundation.org/uploads/1/3/0/8/130873738/3e17a24d56a7.pdf
    • http://files.sacredheartcluster.org/uploads/1/3/0/8/130813888/disitiwetap.pdf
    • https://cdn.shopify.com/s/files/1/0434/9198/3512/files/dukumugewi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5838/7349/files/sawozijapewepudodo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7764/5989/files/85058686255.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/44323436966.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/64797094508.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/31905904411.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/vutoximelopojar.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/65987408870.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/semojuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/mikalesaboze.pdf
    • https://cdn.shopify.com/s/files/1/0436/8056/3350/files/lasanenotepero.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/1/0437/0441/8459/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e46.bin
edab9f16a1188f2493107b10308cb019beed1394dd3ed2893ad50808d5e7e81a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E46 5404 bytes
font_01_sfnt_off0000808c.bin
ef006c2abe80992b9ab3bb3f4f3db52fabded6fe4468c3e9bd5a5809de4c31c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808C 14296 bytes

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