Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3a8faf28a7ebfb…

MALICIOUS

PDF

46.4 KB Created: 2020-08-07 02:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02d7eda7045ac3de5e3709d2b3378c2f SHA-1: 50c281382d977da663b123f462b69c9f2f212759 SHA-256: 5f3a8faf28a7ebfbc5b995f9465bd92bd3c5e609a2eaff19fcdd0e1f875bc4f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the same URL, suggesting an attempt to trick users into clicking it. The ML classifier also strongly indicated maliciousness. The presence of a link farm and a malicious redirector suggests a phishing or scam attempt.

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=business+communication+notes+pdf+bba
    • http://gerob.mortgageinsuranceontario.ca/uploads/1/3/1/4/131453329/fed3a7bd1.pdf
    • http://zesirajaf.lenserotica.com/uploads/1/3/1/8/131857334/971669.pdf
    • http://files.thebigfootstudio.com/uploads/1/3/2/6/132681767/gameku.pdf
    • http://files.craigleacapetown.com/uploads/1/3/1/4/131453005/5748444.pdf
    • http://files.hartjames.com/uploads/1/3/1/3/131381607/pibovutov_likoritu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/zetasodes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/23246546190.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/basigiravetavet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/english_phonotactics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/21747891720.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/42032884080.pdf
    • https://cdn.shopify.com/s/files/1/0431/1695/3751/files/39749406742.pdf
    • https://cdn.shopify.com/s/files/1/0435/4208/5783/files/mobosepafurajinazaratiwa.pdf
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/centrifugal_pump_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/bidituxodisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/howard_bandy.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_off00007207.bin
e681405bbb5926cb40bdf709b392cab223566fe26bba9eb1607215e60d21fb36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7207 5364 bytes
font_01_sfnt_off00008437.bin
dcb9cf6ab032d1eede04a04ee3fbd9d2333db02c23237532cdb75711e6dd5663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8437 12756 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.