Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da60cc1187ff1a3…

MALICIOUS

PDF

70.3 KB Created: 2020-08-05 23:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31c2573c7f4355deca39735b78b0555b SHA-1: 6a6c27e55df14f970bc86fd57f1d517eabd4e39b SHA-256: 8da60cc1187ff1a3baa72d9d451c4a5ff77f76c605566eda5a8dff7b63ddcf93
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=origin+of+benin+kingdom+pdf'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious redirectors and link farms indicates a likely phishing or SEO poisoning attack pattern.

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.ru/pify?keyword=origin+of+benin+kingdom+pdf
    • http://files.northstarsxc.com/uploads/1/3/0/9/130969312/bfddbfbbba.pdf
    • http://files.gsithrift.com/uploads/1/3/1/6/131606121/rujibeg.pdf
    • http://files.kkmediation.com/uploads/1/3/1/3/131383747/jigojewu_derus_vetozilulibidum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/79642683622.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/sutasel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/17542890941.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1771/files/74931512386.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/romoziduzidakiza.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/intel_core_i7-_6700.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/da_3953.pdf
    • https://cdn.shopify.com/s/files/1/0433/2994/5758/files/core_questions_in_philosophy_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4334/7877/files/68032911363.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/assertion_and_reason_for_aiims_download.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_off0000d82e.bin
028ff788a5eea884d8d41930d420dec556f14d4b396b32727ea4da435104502e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD82E 5172 bytes
font_01_sfnt_off0000e9b4.bin
028fd1786253ba335bc582715130a47c6c179633f5c38a82e5653340613ae9ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 10132 bytes