Malicious PDF — malware analysis report

Static analysis result for SHA-256 075ea811a2582648…

MALICIOUS

PDF

58.9 KB Created: 2020-09-06 21:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aaaf5fd728ba51e85e9c56f4f956b2c SHA-1: 63227e94425c5bffc21c674539e75ee428a9281c SHA-256: 075ea811a2582648d47bab3bfcd681b5d3ca351a8adc8ae729657eb42800e003
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector infrastructure. The primary malicious URL identified is 'https://ttraff.club/wix?keyword=copper+mountain+mining+corporation+annual+report', which is likely used to deliver a secondary payload. The document also uses a password-protected archive lure, suggesting an attempt to bypass security controls.

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.club/wix?keyword=copper+mountain+mining+corporation+annual+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/40462328560.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/11_new_syllabus_tamil_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0528/files/quiz_on_facebook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30151397197.pdf
    • https://static.usrfiles.com/ugd/bc84a3_8ad0f936b88646c9a9423fd575acbaf3.pdf
    • https://static.usrfiles.com/ugd/0d2908_99777d0bb458477aaeff7336fba48c9a.pdf
    • https://static.usrfiles.com/ugd/227d0f_f71883f079b348ac848efaceb8e07d12.pdf
    • https://static.usrfiles.com/ugd/a3b54b_f2fd2db9b6dd4e279252116e7902e7aa.pdf
    • https://static.usrfiles.com/ugd/3bca44_fe7f07a82bcf4d23ad6164b7a979bc41.pdf
    • https://static.usrfiles.com/ugd/136d07_21c1bb84157d47d8959d1be0aa76cbf0.pdf
    • https://static.usrfiles.com/ugd/fc840b_300cf4f0c0844636a0541e03e6582117.pdf
    • https://static.usrfiles.com/ugd/c8d394_a595088cbbf946cc90c8645ad64de695.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_off00009fed.bin
d18c68689d5cc295ef4c8fc9107ca435ca3ec03e10580e2dfcf0e43649e28804
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FED 4980 bytes
font_01_sfnt_off0000b0c6.bin
dd04c28915a288a8d1edd1f8194937a05e5f5f9dca03914a34d0b1321009726a
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C6 14516 bytes