Malicious PDF — malware analysis report

Static analysis result for SHA-256 871bcfad5e14beb7…

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 21:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b121f2f75825fe5f10f652d5fd9e7008 SHA-1: 819e6ebb09b192f74e9e62809d41ffd9f94c41db SHA-256: 871bcfad5e14beb756500e51cd453d91e3f85e82615e439a80331a86dd3e725b
154 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. The ML classifier also flagged the document as malicious. The presence of multiple Shopify links suggests a link farm or SEO spam campaign, potentially leading to phishing or malware distribution.

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.com/pify?keyword=languidez+que+significado+tiene
    • http://files.clonmelproperty.com/uploads/1/3/2/6/132681479/neketumupeki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/foxafamisizefavivuxujofaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/74945567600.pdf
    • https://cdn.shopify.com/s/files/1/0432/8541/4056/files/supply_chain_management_bullwhip_effect.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/wigipabasave.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/givov.pdf
    • https://cdn.shopify.com/s/files/1/0435/7403/4600/files/49077535449.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/5124544245.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/95187812450.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_off00005cfb.bin
4df25e82ad46978f3f864becccff23b82bff986064b850618f13b4bd9d265a30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFB 5180 bytes
font_01_sfnt_off00006eb3.bin
af1dba9579fe6c6727339d489b15e5cd07a43e2b8750444a243d415813357dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB3 11656 bytes

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