Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec41f9c4229f389e…

MALICIOUS

PDF

37.4 KB Created: 2020-08-01 21:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8c30b99489c4fd83c56932cb5974cd4 SHA-1: 304a0198351612bf6a0b44de9c0cc23d2e67c02a SHA-256: ec41f9c4229f389ea30c5f48289339c6d5d4d7717c13db7ef0c136befd8c8edc
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous links hosted on Shopify, suggesting an attempt to distribute malicious content or engage in SEO abuse. The ML classifier strongly flagged this PDF as malicious. The document body contains the malicious URL and other Shopify links, reinforcing the attack pattern.

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=washington+pa+dmv
    • http://files.wearecreativepause.com/uploads/1/3/0/9/130969427/xozanulajoxukot.pdf
    • http://files.forestcityfarms.com/uploads/1/3/2/6/132682745/6574432.pdf
    • http://files.caringlearningconnecting.org/uploads/1/3/1/3/131380210/8419119.pdf
    • http://files.mrseppenbach.com/uploads/1/3/1/1/131163734/6416fc87318f5c6.pdf
    • http://files.mysanelife.com/uploads/1/3/0/7/130775679/3863479.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/80094978979.pdf
    • https://cdn.shopify.com/s/files/1/0434/5751/1590/files/26865344674.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/rixapapetenozosolezut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/18996605144.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/lotulokewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/zolebalabawikotijorane.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/58399836846.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30611133668.pdf
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/61970472845.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/filikuzimadob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zemivok.pdf
    • https://cdn.shopify.com/s/files/1/0428/8013/9423/files/baxejoluboxowiboniw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/nuvedemefiduwago.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/34357170150.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_off00005367.bin
d80282cd0a6bf9db8492f6b59bce460172367819d914fbc9e36e9b6d06412ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5367 5320 bytes
font_01_sfnt_off00006573.bin
ca5fdf012a2b21f58dc348f39c8bb7361ace2ff331d94ae297c3c5d0c344c748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 10336 bytes

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