Malicious PDF — malware analysis report

Static analysis result for SHA-256 1168ea0f316d4190…

MALICIOUS

PDF

42.9 KB Created: 2020-08-08 11:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb24dc307302670e857f2cb8243b289d SHA-1: 830d4d7839b39721ef1f58f35575130317039e8a SHA-256: 1168ea0f316d419045256bc661d0ecb5fb374102896d9752e8fe0ed494a151db
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.com/wb?keyword=meal%20planner%20grocery%20list%20pdf. The document body itself contains garbled text but includes the same lure text and the malicious redirector URL, indicating an attempt to disguise the malicious intent. No scripts were extracted, but the presence of numerous links and the identified malicious redirector strongly suggest a phishing or redirection attack.

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/wb?keyword=meal%20planner%20grocery%20list%20pdf
    • http://files.campfirequilts.com/uploads/1/3/1/1/131164431/5247612.pdf
    • http://files.stlaurencenorthfield.org/uploads/1/3/1/4/131406717/wexab_kogotusisela.pdf
    • http://todujemit.treasureseeka.com/uploads/1/3/0/7/130775350/93b559000feec41.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/ziliv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/a_thousand_years_piano_sheet_music_free_easy.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/murenixusoloridujet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/27867023985.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/zukit.pdf
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/sociology_igcse_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/rivit.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/descargar_santa_biblia_de_estudio_arqueologica_nvi_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/tevofomezudata.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/xisirovugek.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/9934550340.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_off00006827.bin
79e52443152a996c4c8328e1051fe459b8f06f90ab42fd4daa17065d206e1bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6827 5432 bytes
font_01_sfnt_off00007ac8.bin
9a9ae297d7fc6d19565cbcb91592dff9ee4e62e8aba93293cda69d397b9439b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC8 10600 bytes

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