Malicious PDF — malware analysis report

Static analysis result for SHA-256 1429b5ef35bd6b56…

MALICIOUS

PDF

38.2 KB Created: 2020-08-13 02:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3221ad91f5d424dfde2af1e7f72f3ca SHA-1: ee2b1f852e3128d823794319b74011e1c74a5244 SHA-256: 1429b5ef35bd6b569618809d558a79f59e3fad3491d47144423f8aa297d95a71
154 Risk Score

Malware Insights

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

This PDF document contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL "https://ttraff.com/wb?keyword=endress%20hauser%20rsg30%20manual", which is flagged as a malicious redirector. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=endress%20hauser%20rsg30%20manual
    • http://files.londontoursatnight.co.uk/uploads/1/3/0/8/130813645/7311200.pdf
    • http://files.hfesa2019.org/uploads/1/3/1/3/131397938/973408.pdf
    • http://vofilo.misswinniesabc.com/uploads/1/3/0/7/130775940/fikumaguwapewegu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/31038347844.pdf
    • https://cdn.shopify.com/s/files/1/0431/9245/1232/files/widedetafike.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/dinugamawuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/xejidixex.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/baputonapamira.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/walexexorig.pdf
    • https://cdn.shopify.com/s/files/1/0432/1781/3661/files/adversus_haereses_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/applied_science_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/morokubadedutoparupur.pdf
    • https://cdn.shopify.com/s/files/1/0440/4664/7446/files/historia_de_las_asambleas_de_dios_del_peru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004876.bin
18ba2d86d4f008ddaede58696a03e04b08d7cf92e52c2a640fbc1c61f48048b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4876 5148 bytes
font_01_sfnt_off000059b3.bin
01a0cc1c6981f0681b6747f5b4a4d48bd5de736b40f72e4819aa9b547eb99aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B3 11272 bytes
font_02_sfnt_off00007e1e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1E 4324 bytes

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