Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df5cf5f84130e0e…

MALICIOUS

PDF

39.3 KB Created: 2020-08-28 03:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4583f2c15f7d434b8f0cc172647891b8 SHA-1: 06ceec5c7b84e300ba32617a5aac65d43efc0c72 SHA-256: 5df5cf5f84130e0e4b34ae3f155aecd914a155f8cab9771f3f1ba566bae2a152
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL 'https://ttraff.me/pify?keyword=ravent+paz%25C4%25B1+nas%25C4%25B1l+pi%25C5%259Firilir' is a primary indicator of this malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.me/pify?keyword=ravent+paz%25C4%25B1+nas%25C4%25B1l+pi%25C5%259Firilir
    • http://navus.shielamahaney.com/uploads/1/3/1/4/131453215/kizutezo_jizezut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1073/4755/files/dikobuxiwanopadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/81159380938.pdf
    • https://cdn.shopify.com/s/files/1/0434/0727/8238/files/56174653350.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2343/files/fovojefikojajonoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/medicity_gurgaon_cdigo_de_alfiler.pdf
    • https://cdn.shopify.com/s/files/1/0463/6557/3275/files/inspector_general_s_report_on_fbi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/badixalolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/80466333149.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_off00005984.bin
e8f949e874658adedfd326e2bba66cd175c013d09fec7de2486bdbf652365ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5984 5208 bytes
font_01_sfnt_off00006adc.bin
e69d1654f497d6e85781425046e9929ce92a4747c8b2250c0efba566ad921634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADC 11736 bytes

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