Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e61c93261c345a0…

MALICIOUS

PDF

34.1 KB Created: 2020-08-10 05:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1daa8099694fe47377ad7b261f4a29f8 SHA-1: ef2d508a897f2514cac959e1c9136658392f789c SHA-256: 5e61c93261c345a02e75bbc3d32bc46b7f1db63bd5e3487b553b0d29670e9952
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link redirects to a malicious domain, ttraff.com, which is known for distributing malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=cambridge+dictionary+of+psychology+pdf
    • http://files.phoenixassociates.com/uploads/1/3/0/7/130775607/niwopojoretitig-gigixe-datob.pdf
    • http://files.civilkingaustralia.com.au/uploads/1/3/0/8/130813898/90d4276.pdf
    • http://files.foreverfork.com/uploads/1/3/0/8/130874237/6d8f83.pdf
    • http://jenapevi.elitewaxing.com/uploads/1/3/0/7/130776485/4773731.pdf
    • http://xedugiger.shoulderto.com/uploads/1/3/1/0/131070374/polelagerejafu-wazodiduzifegiv-wuvopis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/51109962722.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1073/files/greenhouse_effect_wikipedia.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/2015_mustang_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/4239466091.pdf
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/fisizam.pdf
    • https://cdn.shopify.com/s/files/1/0432/5539/8563/files/wigutep.pdf
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/carboxiterapia_protocolo_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/fuxosusegovavi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/gojalazokolaviduwig.pdf
    • https://cdn.shopify.com/s/files/1/0439/4264/1832/files/durga_mata_ji_ki_aarti.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9374/files/76782431656.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_off000046c0.bin
edb44039bbe8b40cf389c11402ca32578b022fb349741807b0e02569a8fca0fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x46C0 5716 bytes
font_01_sfnt_off00005a07.bin
b205b7bc07889cdbb539542622bb0bff9cdb410dbe7cf8ddb1abb980240ae924
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A07 9744 bytes