Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c413f4963556c92…

MALICIOUS

PDF

44.9 KB Created: 2020-08-05 03:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b2c872ac217c2b231822353e57f2ce1 SHA-1: 1914e703649f8ad6fb0fa4e3a78ba18e2a402037 SHA-256: 4c413f4963556c92bcd5f1a8f69fba96c3e9215d79b4b0e3386f800b24c94980
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though partially corrupted, includes text related to 'Types of audio amplifiers pdf' and the malicious URL, suggesting a lure to a potentially harmful site. The primary heuristic indicates the PDF links to known malicious redirector infrastructure.

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=types+of+audio+amplifiers+pdf
    • http://files.dhsupwardbound.com/uploads/1/3/1/6/131637316/a29d3a020af56.pdf
    • http://files.peacelutheranandover.com/uploads/1/3/1/6/131637271/5035790.pdf
    • http://files.pkpressurekleeninc.com/uploads/1/3/1/4/131455475/283639.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/51739511104.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/dark_cloud_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65817182127.pdf
    • https://cdn.shopify.com/s/files/1/0432/0188/8416/files/addition_and_subtraction_worksheets_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/vabepazupuzinum.pdf
    • https://cdn.shopify.com/s/files/1/0430/6599/9511/files/biological_science_freeman_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/screwtape_letters_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/18591576478.pdf
    • https://cdn.shopify.com/s/files/1/0446/6468/4697/files/acta_constitutiva_de_sociedad_mercantil_mexicana.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/castle_crashers_industrial_castle.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7137/files/99458979723.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/linux_setup_virtualenv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/43908184471.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/narakekakad.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_off00007321.bin
61b66aec56c2a5f6b997a72fb24f899962c406cd5f22a376b6fa5f060664b29d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 5236 bytes
font_01_sfnt_off000084e5.bin
2bcafd8c3fe7cdaad3db8091a3fa5a16d35ea580bf42850dfb85ceed755f47cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E5 9992 bytes

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