Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc9f681841eec10…

MALICIOUS

PDF

47.8 KB Created: 2020-08-13 19:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aebdd486d4c70fdec80a8404a0d52fa8 SHA-1: 72a6a00374681cfa0cccfa08c3b58fbaeba336de SHA-256: 2cc9f681841eec1099927b56996efd515e8f3eb31da5c6f415458543aed7aca0
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wb?keyword=e-maxx%203908%20manual. Another critical heuristic indicates a PDF link farm, with many links pointing to shopify.com and other domains, suggesting an attempt to manipulate search engine results or distribute malicious content. 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/wb?keyword=e-maxx%203908%20manual
    • http://files.drsuemalley.org/uploads/1/3/1/0/131070911/1192e731b09f.pdf
    • http://vedupuka.fusiontheatre.com.au/uploads/1/3/0/8/130874368/selazevafusonatixo.pdf
    • http://nulerarim.varsitygoods.com/uploads/1/3/0/7/130776330/a5d8c.pdf
    • http://files.frs.com/uploads/1/3/1/3/131398555/gitonaxageko-xuwarigazeto-zarerapetop-dovufojuriropu.pdf
    • http://files.swissornaments.com/uploads/1/3/1/8/131871390/7938973.pdf
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/acceleration_due_to_gravity_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/9227125597.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/zowuwegomurebegerewutaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/44830181862.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/29765593897.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/sifabuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/calendar_worksheets_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1954/files/44788726678.pdf
    • https://cdn.shopify.com/s/files/1/0430/2081/2441/files/mukowowedajipadamivug.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/beromekumekubexutevagu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/goleligusiferabokutarukof.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_off00007a51.bin
6197a54333d88cf9875add2f19c6cd9e66dc4ae18930758611fe01e6ef8f1771
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A51 5268 bytes
font_01_sfnt_off00008c2e.bin
ae574f586e160d591ff8a990e337728bcc5605f88b1f2907a610062273a6efa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2E 11404 bytes