Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9e2895acc7c624…

MALICIOUS

PDF

44.0 KB Created: 2020-08-09 03:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80b95e86a743adb3d5565d1e4f7ac32e SHA-1: cb2976ac1ab03591c96eb5594be28982014d5d05 SHA-256: 5f9e2895acc7c6245c5f2ad49468e8bd0dc7377eb8c095fb6d64cf8539dbae45
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one that redirects to malicious infrastructure, disguised as a 'PDF book reader download'. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update, a common social-engineering tactic. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.ru/pify?keyword=pdf+book+reader+download
    • http://files.executivesuitesofcapecoral.com/uploads/1/3/1/3/131384098/9190152.pdf
    • http://files.davesartdimensions.com/uploads/1/3/1/6/131606348/vojetiborakupo.pdf
    • http://files.gilfordphysicaltherapy.com/uploads/1/3/1/6/131637177/memuju.pdf
    • http://files.prrms.com/uploads/1/3/0/9/130969489/9540295.pdf
    • http://www.fotolia.com''gt;Fotolia.co
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/sasezuto.pdf
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/traders_guide_johnstown.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/subarachnoid_hemorrhage_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/89508414890.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9927/files/41633808946.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/xemiduvotowazikok.pdf
    • https://cdn.shopify.com/s/files/1/0437/5648/6807/files/bowen_mathematics_solution.pdf
    • https://cdn.shopify.com/s/files/1/0435/1488/8360/files/java_programming_tutorial_in_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/erik_erikson_theory_development_stages.pdf
    • http://www.fotolia.com
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006359.bin
f7ba8cf4d0aca533096ce678bcb5325c516db9e7e778990134b397cf03333a43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 4680 bytes
font_01_sfnt_off00007352.bin
a6eb0d74f99d3984fe726f887736d4c54d16e759937d34883df7a53405bb10ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7352 9956 bytes
font_02_sfnt_off00009567.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9567 4324 bytes

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