Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcb396968d39eea…

MALICIOUS

PDF

53.0 KB Created: 2020-08-30 15:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8156ebbc4544ca874ca120f6f8b1f0f SHA-1: b6f01440c908584f41405cc74bc575f4815931e1 SHA-256: bbcb396968d39eea539ea20154b990edf6627e5987a9f8b53ee20263d891755d
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=fallout+shelter+the+raven+flies+at+m, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and other links to Shopify-hosted PDFs, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.cc/wix?keyword=fallout+shelter+the+raven+flies+at+m
    • https://cdn.shopify.com/s/files/1/0429/3735/2358/files/kerivulaxunobodezukibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2646/files/79322907761.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/35981073206.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/74772984752.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/44602450798.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/45327085462.pdf
    • https://cdn.shopify.com/s/files/1/0461/4271/8115/files/accident_incident_report_forms_templates.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/online_photo_editor_free_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/4764338826.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/24780466502.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/41480916835.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/21126208627.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/rigodukavirit.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_off00009340.bin
cb01af96480760a16c994cc2302e2c1e41d3af5b919c9f0c2a9a41d856711c67
pdf-font-stream PDF embedded font (sfnt) at offset 0x9340 5024 bytes
font_01_sfnt_off0000a430.bin
637a0faf240fc1805bffaaf29e15e4afdb8dd0f3b43079b0c4e60728110c51b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xA430 10272 bytes