Malicious PDF — malware analysis report

Static analysis result for SHA-256 669e6494a6380107…

MALICIOUS

PDF

38.5 KB Created: 2020-09-10 00:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 121cf3f34544226e23d4636fcb83b630 SHA-1: 7cd4b60cd44de667dee35cf9b12456764dee1e51 SHA-256: 669e6494a638010778ab5c819bc82de2f022d0fca3de7f1fc26986ca5a08378b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics indicating it's a redirector and part of a link farm. The document body, though obfuscated, contains URLs that are also listed as embedded URLs. The presence of a password archive lure heuristic suggests an attempt to bypass security controls by encrypting a payload. The ML classifier strongly indicates maliciousness.

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.link/pify?keyword=brocade+switch+commands+pdf
    • http://vusogojox.bacchusmarshrotary.org.au/uploads/1/3/2/7/132712127/6908116.pdf
    • http://tawosu.nataliebonifay.com/uploads/1/3/0/7/130739573/057f9d07376e.pdf
    • http://files.ripplearts.co.uk/uploads/1/3/2/6/132681812/8b0c7a4cc81e54.pdf
    • http://files.pearlywhitespediatricdentistry.com/uploads/1/3/2/6/132695629/9773925.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/91609064688.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/569014261.pdf
    • https://static.usrfiles.com/ugd/f1d680_42a8866932594bf2b75dbfa568e72a5b.pdf
    • https://static.usrfiles.com/ugd/7008f3_2d6010b059d741068fe288182e77e6b8.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/agglutination_reactions.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/marketing_information_system_philip_kotler.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/73415479983.pdf
    • https://cdn.shopify.com/s/files/1/0432/5215/4532/files/xoninam.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_off00005894.bin
9e7f9c9b4fcaecf49d275e5e5ffdf59fdfb5190a6077f0d7fec9ddaec38fdafe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5894 5504 bytes
font_01_sfnt_off00006b35.bin
fa5a08241d8bf4f75ad45c551b9b22fd9847a1bdef20ed8dea312aa8558f15e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B35 10084 bytes