Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a4022b8dd51a7d…

MALICIOUS

PDF

35.9 KB Created: 2020-08-01 14:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9798136eb0aa65d70dd6bc094afa2c3d SHA-1: 63828369362882e31ca36b7aecc55cffee7fadae SHA-256: b4a4022b8dd51a7d75c9a7f40d1cf3219d46d103834459bda2ff58df154f4f27
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=zzzz+the+cab'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site.

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=zzzz+the+cab
    • http://files.gobo-projector.eu/uploads/1/3/1/3/131380467/bf12094b.pdf
    • http://files.sritejareddy.com/uploads/1/3/0/7/130738956/5582605.pdf
    • http://files.sports-supporter.com/uploads/1/3/1/4/131438510/470507d.pdf
    • http://files.greatergoodconsultantsct.com/uploads/1/3/0/7/130775905/nuxenipirelonus_luzanefe.pdf
    • http://files.playistheway.ca/uploads/1/3/1/3/131384777/b056c3b.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/lubiferuvazup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8537/3333/files/fozomixupilalutazor.pdf
    • https://cdn.shopify.com/s/files/1/0440/5939/4213/files/76895464372.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/30023545192.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/fewamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/kononinuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/bopuwenafiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/51743986884.pdf
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/61931953916.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/70964097335.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/78952056503.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/94069581289.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/bagobemunabeloniruranel.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_off00005123.bin
c24f43c7ccfad94c398af677b861b09f29eb6c585c2028f6903e3f4c29b2aa0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5123 4728 bytes
font_01_sfnt_off00006140.bin
4ab852b71cc055f5d9cdff8c2c43f6262b21b6dec41189180c2e0f8dbed2d460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6140 9856 bytes

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