Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9c61aa43f4f106…

MALICIOUS

PDF

61.7 KB Created: 2020-09-06 05:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3259c33566456adea0a570fdabf762a1 SHA-1: f874e4341f6cc4593e2853cf73246450d95b6cb5 SHA-256: 6a9c61aa43f4f1065aa81786c7c7f9cdd0488d6702a596bef09eeec0774058d0
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.club/wix?keyword=ubuntu+server+16.+04lts'. The presence of a password-protected archive lure suggests an attempt to conceal a malicious payload. The ML classifier also flagged this PDF with high confidence.

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=ubuntu+server+16.+04lts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0461/5054/9667/files/93132440624.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/ds2_soul_of_a_giant.pdf
    • https://cdn.shopify.com/s/files/1/0440/6296/5912/files/78977099882.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1968/files/zexinosamo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/budgeting_and_forecasting_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0468/8923/8685/files/chloroform_methanol_extraction_protein.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/8921824882.pdf
    • https://static.usrfiles.com/ugd/3be3a7_90a8bd72afbf4d428bfe9694394d05c4.pdf
    • https://static.usrfiles.com/ugd/3b47cb_620f12ff96854a718128ded2b5f219a0.pdf
    • https://static.usrfiles.com/ugd/1decf9_495453e727404886ad4daa35862b52a7.pdf
    • https://static.usrfiles.com/ugd/29c71c_bac13ec7f15b4724be2a4b14fbb0e531.pdf
    • https://static.usrfiles.com/ugd/3f80ec_552c7b7132fa407f94fd85291e37d7e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba56ac88bcc741a4a8944f744bfed64b.pdf
    • https://static.usrfiles.com/ugd/9e41f0_92396deb277645f79f66b5349c601a4b.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd3f338279524cbdb4d0238203f1e331.pdf
    • https://static.usrfiles.com/ugd/b8c837_9484169f27cb4bb9ba43388afdc33d1b.pdf
    • https://static.usrfiles.com/ugd/83e24f_00a7d8c84b594f9bb68b803715f53c6b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a1d.bin
954d61ea75312e2ad47a9e10b825101ba1695b5ad282aca112fe64115c1b0d12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1D 4852 bytes
font_01_sfnt_off0000aac2.bin
51f5eeebc72fb3ec8847e12b19e6471973e8ba8d99086e9d06e07c907bf7d5cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC2 15764 bytes
font_02_sfnt_off0000dbef.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEF 4324 bytes

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