Malicious PDF — malware analysis report

Static analysis result for SHA-256 52246485d84f48e1…

MALICIOUS

PDF

44.8 KB Created: 2020-08-20 04:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f793503dc014dcb18ab44caf2835d55b SHA-1: eb046ba75b04ed5bc120b44a2e6da74c3901ecad SHA-256: 52246485d84f48e1508be5f9ff566d53ec8e95a0b2563ad3f87615bdf772ec12
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a large number of external links, characteristic of a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=tempat++template+ppt+animasi+gratis, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains this URL and other Shopify URLs, suggesting a lure to download or view 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.ru/pify?keyword=tempat++template+ppt+animasi+gratis
    • http://fojepaj.fighr.org/uploads/1/3/1/6/131607600/lukefigepid-fexorobuwemile-liwavuzemu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7517/3529/files/companies_house_beta_forms.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/waymo_self_driving_car.pdf
    • https://cdn.shopify.com/s/files/1/0437/5874/7800/files/arithmetic_reasoning_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/32190944678.pdf
    • https://cdn.shopify.com/s/files/1/0461/7489/6281/files/32249956488.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/28504429365.pdf
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/zupokarijamezumakavid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/lubemaner.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/52144519318.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_off00006ced.bin
d3f422417da1a0a114457e38b754ae80edb8b9689f5e32e002b52b0800507a44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CED 5088 bytes
font_01_sfnt_off00007e1e.bin
809ab594296d6e376a70feb0d3ef68daee95f05e766ebb6197f2e52f88b201f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1E 15856 bytes

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