Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee507943a52abbbf…

MALICIOUS

PDF

102.2 KB Created: 2020-08-01 12:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5c4c906beb818d4941dadaa97cfab89 SHA-1: 221ccda2ef03607bef979da47b7787933c1340e4 SHA-256: ee507943a52abbbfbe4a936c4c86304f025112d211a2cb1aaeb202d46ef5464a
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identifies a link to a known malicious redirector, `https://ttraff.ru/pify?keyword=stevie+ray+vaughan+net+worth`, indicating a potential phishing or malware distribution attempt. The presence of many Shopify-hosted PDF links suggests an attempt to obscure the true malicious intent by leveraging seemingly benign hosting platforms. The ML classifier also strongly flagged this PDF as malicious.

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=stevie+ray+vaughan+net+worth
    • http://files.clairemanwani.com/uploads/1/3/2/7/132740900/5249915.pdf
    • http://files.leedsdeckingandfencing.com/uploads/1/3/0/7/130739315/furabuwejeg.pdf
    • http://files.leafingthroughbooksandtea.com/uploads/1/3/2/6/132681713/338398.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/tamemaxusowor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/jigaxasorovadebaralov.pdf
    • https://cdn.shopify.com/s/files/1/0439/5371/7406/files/muvetigitifawarafijiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/9409630438.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/gorizurugo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1445/3410/files/nagatorofokojoraso.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/discord_custom_font.pdf
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/figalujujoguni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0436/8764/1241/files/tumomobupa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/dekujarazipivufitafeko.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_off00015635.bin
747294131af6f7c321a64a16b8b6c0c391a10b324dcc52934b6579c3d101301d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15635 5092 bytes
font_01_sfnt_off0001679c.bin
f23ac1f9bf3ab43449afc6ce5ca0a0bfa399d6741ae2b3f9e3bf57b695175ca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1679C 10640 bytes

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