Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22530a983e36c3e…

MALICIOUS

PDF

59.0 KB Created: 2020-08-06 09:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0cd5b3741a4d412311d7cb08f54701b SHA-1: 5cd4176f33ca944f2c67814bd00ffc70c6bc885d SHA-256: e22530a983e36c3eab750753b17c6449268c90bba75f31c52574a8967b02a3dc
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is presented to the user as a 'website accessibility checklist pdf'. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.cc/pify?keyword=website+accessibility+checklist+pdf
    • http://files.mindfulthanet.com/uploads/1/3/0/8/130813639/posok.pdf
    • http://wusugaxet.schnursgreenhouse.com/uploads/1/3/1/4/131406437/pofalelale.pdf
    • http://files.sjcchamilton.org/uploads/1/3/0/9/130969489/maxagive-botorodox-xumulerebizup.pdf
    • http://files.nationalscientific.co.uk/uploads/1/3/0/7/130776104/3354206.pdf
    • https://cdn.shopify.com/s/files/1/0432/0467/3699/files/donapabewojamira.pdf
    • https://cdn.shopify.com/s/files/1/0430/8775/7461/files/panurokizewatux.pdf
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/57197867949.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/moridodijajesojefi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3423/7345/files/falevatifosibivafafij.pdf
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/pdf_files_download_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/tuduvet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/57397745849.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/posisubapaxibeguvidoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/36548776369.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/sedulanomot.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/23503506544.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_off00009f50.bin
a2eea39cfa349283f6a94bd76dac6ce6e281acbad56a346289247fc4c2c73757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F50 5464 bytes
font_01_sfnt_off0000b1fa.bin
1fc4e0d7e631e05107f59c69de3e22f62fb0ee1c0cd23b4ddc354b3a36d600c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FA 14356 bytes

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