Malicious PDF — malware analysis report

Static analysis result for SHA-256 2261c9720a1b717e…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 08:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a5b68b11305561aa4fe757b8b1c8b56 SHA-1: 86daa5b1743f1f28e8c83f316fb2b0076a306cea SHA-256: 2261c9720a1b717e821cd70f6aaccf13cfdbb85fe25cd9d6f66f40f8640deadf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm pattern, with many external links, likely to manipulate search engine results or lure users to malicious sites. The primary malicious URL identified is https://ttraff.ru/wix?keyword=placa+de+torax+normal.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=placa+de+torax+normal
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/subugasaginibunoko.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/lobuwimumebuboraligavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9815/files/55193187885.pdf
    • https://static.usrfiles.com/ugd/b8c837_af35e6affb74459cab87e6b8962c670c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78055f4d46e43aabdc759bd590ecc76.pdf
    • https://static.usrfiles.com/ugd/b8c837_d96409ce92aa4962b89c951cf2747b4e.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/200094656.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/mesemokobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3035/5866/files/reratenugefikoj.pdf
    • https://cdn.shopify.com/s/files/1/0452/4494/0445/files/27293361519.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_off00006913.bin
adec15b8855ecae91beaef889c425afeee8501fb6d454027996bb5fbda5e105f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6913 4976 bytes
font_01_sfnt_off000079dd.bin
ce9601b7579d6e4e05eee1cd03329455ddf16e0986c75038c92cbfd7fa1666fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DD 10888 bytes

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