Malicious PDF — malware analysis report

Static analysis result for SHA-256 1850209a8bfad5ba…

MALICIOUS

PDF

36.7 KB Created: 2020-08-19 01:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef40037127b63704b2af7a3f609c25df SHA-1: 63985eb397b749bd961ab8d5034216aed85629ed SHA-256: 1850209a8bfad5ba405b320a921dd8f5c48c452754779b395b3ba37de09f3e01
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of many Shopify-hosted PDF links suggests a link farm designed to improve search engine ranking for malicious content or to obscure the true destination.

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.com/pify?keyword=ben+10+omniverse+game++ppsspp+gold
    • http://files.lucesaid.com/uploads/1/3/0/8/130814874/678995.pdf
    • http://betisodel.stpaulscollingswood.com/uploads/1/3/2/6/132695742/1235175.pdf
    • http://files.stpaullutheranph.com/uploads/1/3/1/8/131856034/solidobokapitu.pdf
    • http://files.renderdesigns.com/uploads/1/3/2/6/132681596/7921601b1f862.pdf
    • http://files.region15daylily.org/uploads/1/3/1/4/131437352/7261328.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9734/1604/files/non_linear_op_amp_circuits.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/71611984835.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3355/files/www_pipeline_wayne_edu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3617/2710/files/zunusetexew.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3360/files/96885018247.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/wheeler_curriculum_development_model.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/zimevixowujabomudosos.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/89359225067.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/34533741852.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/17365713586.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_off00005154.bin
68c22376de0106982e01aa9a3696c4e6008abb399e1fea8eee9f63ed02d8c4f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5154 5580 bytes
font_01_sfnt_off0000643c.bin
9eeed1cfa2e9e377c9279c31ee865acbe51fab932e3ec3a4b9305efdff400d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643C 9920 bytes

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