Malicious PDF — malware analysis report

Static analysis result for SHA-256 82becda7b19bd344…

MALICIOUS

PDF

69.1 KB Created: 2020-08-29 20:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed3820ffa299598a1b4871f347869b8f SHA-1: 01379db05cdca6d67a8853c7e89f4e6532591a73 SHA-256: 82becda7b19bd34409e28e96434aad288b0e564d77c6dd0d77cb0bf688c54331
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains the same malicious URL, suggesting it's part of a lure to redirect users to a potentially harmful site, possibly for phishing or malware delivery.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=gurgaon+Rotlichtviertel+Adresse
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_8ab13af961bc4280b78ae6cec885a270.pdf
    • https://static.usrfiles.com/ugd/b8c837_92c89f0ed4484e788e34c4f08e9f3aa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e92078842fa141ccbf09640afcee7c59.pdf
    • https://static.usrfiles.com/ugd/b8c837_14cb80bdcb40485c9783e7d101722bf0.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6374/files/alcon_rebate_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_69d46a86d57242f8bd80074e665adb88.pdf
    • https://static.usrfiles.com/ugd/5ad03d_582bfd4582cf47a9988bb8dbc7f6ed7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_20fe375843044a3baf5c702ce1fd4132.pdf
    • https://static.usrfiles.com/ugd/b8c837_40e857416bb2443d99783f60dfa5c845.pdf
    • https://static.usrfiles.com/ugd/b8c837_1203834decad448b98ae5f210da8ec49.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_off0000cc9b.bin
c449695d9debd334299d801fb0259138f7c8ebf8447b30472965e907f08c77b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9B 5476 bytes
font_01_sfnt_off0000df43.bin
dfbbca868b0d329d1e144f1beddeb791d22873e1f808351b2fdb133461e9fa4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 11944 bytes