Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb77efc4532330a1…

MALICIOUS

PDF

45.5 KB Created: 2020-08-30 11:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30b6bc8c6cade003c58dce12281a983b SHA-1: 9ee96aeb1bb709b37909d7f91b5879452044f87f SHA-256: cb77efc4532330a10000ba93aaa11b596b895b1d75bf46f6d6ec4243485400a9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL 'https://ttraff.com/wix?keyword=dynacord+pfe+150+haut-parleurs' is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, reinforcing its presence. The ML classifier also flagged this PDF with high confidence.

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/wix?keyword=dynacord+pfe+150+haut-parleurs
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/munuwasetizupavotis.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/example_of_diction.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1126/files/13632573465.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d175c591d8d45b98a37a652e5fb167c.pdf
    • https://static.usrfiles.com/ugd/493135_14fe6cb4754b4bf29fcfcc88ff6caf6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bf8c48e0ef7482bb56a3cdecb7b465f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3811e37d0c8743cab2f69d7afb52ad4c.pdf
    • https://static.usrfiles.com/ugd/c63dba_9243b6dac7804392880ec3466cb69c98.pdf
    • https://static.usrfiles.com/ugd/a298ce_c68138696bb7412bb130dae37802cbf8.pdf
    • https://static.usrfiles.com/ugd/93971e_b2663cef137c46659fbfbe5993b2226b.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_off000063d6.bin
1a1322cbafa6ba2193ac195df859722b28d2708d36fe1be56d5985304e72653c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D6 5696 bytes
font_01_sfnt_off00007744.bin
5a95b6ffd707be589bb24097031cde1e68c18416236a04aadb18e5a4509fb57f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7744 16776 bytes

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