Malicious PDF — malware analysis report

Static analysis result for SHA-256 617d932ac3fd49fa…

MALICIOUS

PDF

45.1 KB Created: 2020-08-22 10:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e943a97c4a726a79997c64abf3a6625c SHA-1: 9bbf17170ec8957c673d59c48352dbdeb8d5a6c5 SHA-256: 617d932ac3fd49faefe6e7829fb911d1ce1d2d72cace5c8833b230086b6718ce
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.cc/pify?keyword=business+case+template+excel+free', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=business+case+template+excel+free
    • http://rorupol.thecatsmeowtarotandtalismans.com/uploads/1/3/1/0/131070027/9267947.pdf
    • http://gipew.youthultimateprogram.org/uploads/1/3/0/7/130775583/wowarefevadufet.pdf
    • http://files.ohiofalconry.com/uploads/1/3/2/6/132681517/texeleguja.pdf
    • http://files.gregdwyerart.com/uploads/1/3/1/3/131379894/regofe.pdf
    • http://files.personalchefsmarbella.com/uploads/1/3/2/6/132695832/bifaza_kiziwobowuje_jagajad_xagowomunisoxuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/sopobutepe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9620/3679/files/62964718369.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/sedepegazawip.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/38239536644.pdf
    • https://cdn.shopify.com/s/files/1/0437/6009/1287/files/99831441580.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/meio_ambiente_e_sustentabilidade_rosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/bumanosokebevopazujiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3574/files/2016_physics_regents.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/germination_of_seeds_experiment_report.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007224.bin
2c03b7ef33e44528b0da14d5dc9a03f3f7d1c27df40b3f810a79240303ee7155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7224 5276 bytes
font_01_sfnt_off000083ff.bin
283e4fa7874cd81551e1a4491f8f673f34739fb800a8f574d9ab940843ab5d62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83FF 10332 bytes

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