Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbdf24d99831da9…

MALICIOUS

PDF

29.5 KB Created: 2020-08-15 08:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35ee435ad6d0ea31ffa121f9eb3051fd SHA-1: 7bfb52c1737787d730bb5322818a073f5a5da57b SHA-256: 2fbdf24d99831da9c41451529385bbfc10abacb139e898a140e3d3917328ebd8
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=lowes+hand+saw+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination.

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=lowes+hand+saw+guide
    • http://talizeb.bighornmountaincrawlers.com/uploads/1/3/1/4/131437119/915134.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7287/files/91302894531.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/7972186393.pdf
    • https://cdn.shopify.com/s/files/1/0444/0568/6438/files/construction_company_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/bates_clinical_examination.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/gexelosafogisozutezupof.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/puntos_de_partida_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/7616/3486/files/54010068055.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/riwew.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_off00003cbd.bin
907d6e020331746e26b88ffd278e47888ed6ec6bc69ab64fb9a0e9f5cc1c02a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3CBD 4992 bytes
font_01_sfnt_off00004dc7.bin
14dcb06febce5ab973c232f4820fa73633921850d718ed67ca645a41b4394db1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC7 8324 bytes

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