Malicious PDF — malware analysis report

Static analysis result for SHA-256 b321825308ce3222…

MALICIOUS

PDF

49.5 KB Created: 2020-08-07 03:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9490023c355161e00771540805ccf72c SHA-1: 64b19858d5a0221cce59f3b6502735e06948c623 SHA-256: b321825308ce322287b0b7bd0b7c238154eb4b9930fa1dae16901ac00bf6b9e8
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, likely to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text fragments that appear to be a product brochure lure, and the PDF itself contains a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or to obscure the true malicious destination. The primary malicious URL is https://ttraff.cc/pify?keyword=brosur+kusen+aluminium+alexindo+pdf.

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.cc/pify?keyword=brosur+kusen+aluminium+alexindo+pdf
    • http://files.pittsburghaiha.org/uploads/1/3/2/3/132303035/75cd28bde029be.pdf
    • http://barupo.suzannedcorsey.com/uploads/1/3/0/8/130874655/demosujebul-ridujopikolakor.pdf
    • http://files.purezaoliveira.com/uploads/1/3/1/4/131409210/e9bde98.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wojifuxazax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/siwowopiraboxisikuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/wufituve.pdf
    • https://cdn.shopify.com/s/files/1/0433/4233/2057/files/sample_letter_of_recommendation_for_medical_school_from_doctor.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/at_t_dns_servers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43034806536.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2262/files/mesiwokufodavewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/konexatolesidiwakokaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/55768756178.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/rusisemuva.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_off000078f4.bin
7de5f0c4af5f6a1af50fde659ffbd75024b83988b356bb70c51ff2308026b2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F4 5368 bytes
font_01_sfnt_off00008b29.bin
97de065330efb1e06ce4bf41825efda449dbc945a6e97c98d3037be6e43d1e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B29 14576 bytes

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