Malicious PDF — malware analysis report

Static analysis result for SHA-256 f675920a758dbeff…

MALICIOUS

PDF

41.8 KB Created: 2020-08-02 04:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa271370ec5974b2e7209bd08e72bd8c SHA-1: f6db43af73196c75bbc90861494d155c7a066bd0 SHA-256: f675920a758dbeff188566debb0ea0c995b4ecc1a7e490bcfe70e69027f0d838
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body and embedded links suggest a lure related to game cheats, aiming to trick users into clicking the malicious URL. The ML classifier strongly supports the malicious verdict.

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=saints+row+3+pc+cheats
    • http://files.sisterlocks.com/uploads/1/3/0/7/130738700/wulagivosow.pdf
    • http://files.utartstudentgallery.org/uploads/1/3/1/4/131438313/minakumofane.pdf
    • http://files.eringreenauthor.co.uk/uploads/1/3/1/1/131163898/6694046.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/lozipivutuxale.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/lajisomifig.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/wezunoginalunededakodax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/dizumopumovunoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/36629597455.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/89964308887.pdf
    • https://cdn.shopify.com/s/files/1/0433/1972/2152/files/kibunuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/luwefixesesaxitisija.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_off0000651a.bin
62743a99beb94cc2ee4ede177721a1fb9e108848d5562b418df233d08bfbdf19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651A 5348 bytes
font_01_sfnt_off00007757.bin
6a0796b9c13d791983ccd11a8cde42b322254c21bd2a2705f93a545212de9249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 10364 bytes

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