Malicious PDF — malware analysis report

Static analysis result for SHA-256 4307e2eb9a653dc6…

MALICIOUS

PDF

48.2 KB Created: 2020-07-27 05:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa036907c8080ad00933ab4faf2656f3 SHA-1: e3515bf34ad28675946a13b633e64a318c0d75ae SHA-256: 4307e2eb9a653dc6c18aceeada344c693b16638a6e98d0b56e49abc1ba4e2f7a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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.com/pify?keyword=incident+report+format+hospital
    • http://files.phsboosters.org/uploads/1/3/1/3/131381031/ditonagigob.pdf
    • http://files.banginhardfireworks.com/uploads/1/3/2/8/132814241/robajamutanik-kizesuvig.pdf
    • http://files.genesiscarconcepts.com/uploads/1/3/0/8/130874361/jekezabuzejakesev.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/ratokabuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8775/7461/files/14831732066.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57896919986.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/78209725690.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/7662766266.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/litipiruxem.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/tudabosawarogedoduzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/suvewimurivopageb.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/41101337748.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/39814128915.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38967404473.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/76347792144.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f0b.bin
4ffc238b9c2d671cadf0d5a839c09953acc4f25a8102ee5394fed357b6af52e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0B 5120 bytes
font_01_sfnt_off0000902e.bin
1f13ca22b78c84202fccaf30bab5942780dc37f2bd6a25170b5d9198b9b0ce8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x902E 10472 bytes

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