Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0d37f878a6f216…

MALICIOUS

PDF

46.5 KB Created: 2020-07-30 15:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e06379cec51bc2ec79f607005dcd8b3 SHA-1: d3d3545d885ab3c789a9dd35444c2a3820088a7c SHA-256: 5e0d37f878a6f2160e119d32de8151f47534daf257c8334dacdd49baaeee6e19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or distribution mechanism. 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.cc/pify?keyword=articles+intermediate+exercises+pdf
    • http://files.shopsassypantsboutique.com/uploads/1/3/0/9/130969801/pibuzesoganojilari.pdf
    • http://files.tingathe.org/uploads/1/3/0/7/130775760/totoziwa-gojawewonasuxod-gopolila-kewosatubozavep.pdf
    • http://files.lrmha.org/uploads/1/3/1/3/131379111/benifenotolavosewin.pdf
    • http://files.blackrosesdartscharity.com/uploads/1/3/0/9/130969148/0806c0.pdf
    • http://files.lmcooke.com/uploads/1/3/1/3/131380343/840056.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/bilebipirulem.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6604/files/doviwin.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/bovasulexolerolar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/67887373372.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/domametitinemowanu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9681/files/pavemiwinaru.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/xozodafotififepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/25904796412.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/36984931392.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/botozotetani.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/597184682.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/fejik.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/67926462585.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_off000074fb.bin
926a68be18788267d7429d5a0e90f1989101ce9279365ca063e5334e065209f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FB 5036 bytes
font_01_sfnt_off000085f7.bin
08017f41c46c610918082566781e692b8ff55de73330275b5f36a74d4581728d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F7 12084 bytes

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