Malicious PDF — malware analysis report

Static analysis result for SHA-256 df936dfd3a3e1001…

MALICIOUS

PDF

43.3 KB Created: 2020-08-28 07:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7d95df00ee0b64fb0f7c4a9a8ca240a SHA-1: d810aebe80d131073e9f16a01004ffc03fba0f3c SHA-256: df936dfd3a3e100172bf4969b1e51b5f5ad8ffa0c15c9b749521877215d398a8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=puritan+bennett+840+manual', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Puritan bennett 840 manual', suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute the malicious content.

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.com/pify?keyword=puritan+bennett+840+manual
    • http://pusedorub.fallinjuryprevention.com/uploads/1/3/0/8/130814921/4737422.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5980/files/31508951274.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/98131433967.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/32559710806.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/the_anthropic_cosmological_principle.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/zibegematikemawuza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/alien_shooter_hack_version.pdf
    • https://cdn.shopify.com/s/files/1/0439/9982/1982/files/minecraft_1._7._10_city_maps.pdf
    • https://cdn.shopify.com/s/files/1/0438/4705/7568/files/similar_triangles_problems.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/las_relaciones_peligrosas_libro.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_off00005e44.bin
e6844cbee6c3f4d80e8a715139eaaa9e9dd0e425babf5551eba932cfcd7c02c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E44 5220 bytes
font_01_sfnt_off00006fef.bin
fbb49e315897b3f14ed962df6b72357e00ab4ff71f506ac2970a114d99a1e588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEF 15400 bytes

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