Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9be917f318390d…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 02:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7796ce7210439c681c6dc532d939e2b SHA-1: f3b34fb8f5e3ac2f77fa0a71d08cec4b77b9a109 SHA-256: cc9be917f318390dd5c9443fda6cb8a2c3d5bc344a1628fe7218314d99b43f67
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm infrastructure. One of the primary links, https://ttraff.cc/pify?keyword=ankylosing+spondylitis+stretches+pdf, is identified as a malicious redirector. The document body itself is heavily obfuscated and appears to contain embedded URLs, further supporting the malicious redirection intent.

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=ankylosing+spondylitis+stretches+pdf
    • http://nojeba.harmoniousbeing.co.uk/uploads/1/3/2/6/132696212/rotumuvoxozatatola.pdf
    • http://xozakoz.aussiedoodlewoods.com/uploads/1/3/0/8/130814328/9773316.pdf
    • http://posopo.sarahparra.com/uploads/1/3/1/4/131408100/dejina_sijiluno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/ap_eenadu_epaper_today_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/zoxajerulakelexuvagumigak.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/nuworilamogomim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/vexologakapigukasogifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/46079851853.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/71315394876.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/90449968706.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/23179663901.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/73471619352.pdf
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/55048672715.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kawovuk.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_off00006d6d.bin
835e1b43747071c8698a05a2f05e39787071f90f196a19c244fcf4a65c8d00ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 5360 bytes
font_01_sfnt_off00007fb9.bin
e54c43f316cfe769a1d17dc2ce9c2d6174a8022a4969cb68f0317d8d06ad275b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB9 9872 bytes

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