Malicious PDF — malware analysis report

Static analysis result for SHA-256 144fc6bd6ac0b421…

MALICIOUS

PDF

50.2 KB Created: 2020-11-04 03:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f5c7c59b69ceecbe61720fe93b1d317 SHA-1: 799bc780446a62f6783dd4fa21b1572d005fdd4d SHA-256: 144fc6bd6ac0b421bb048b856ee691ce05be6844b22bffe0937810d06c6da688
94 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically `https://gettraff.ru/aws?keyword=database+for+dummies+pdf`. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the critical heuristic firing indicate a phishing or redirection attempt, likely to deliver a secondary payload or lead the user to a fraudulent site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/aws?keyword=database+for+dummies+pdf
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/depebonunod-mukaxif-zipebotagamiv.pdf
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f9ca4f766dcc.pdf
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8709fb687ed.pdf
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f89c9ea867d1.pdf
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f9b04e69c322.pdf
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/kovixu.pdf
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5f9802610f919.pdf
    • https://dalowosa.weebly.com/uploads/1/3/4/3/134383453/tageje.pdf
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f8c255066797.pdf
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/6219476.pdf
    • https://zenovoruzunej.weebly.com/uploads/1/3/4/3/134339910/2d87e99f82.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/13844200247.pdf
    • https://cdn.shopify.com/s/files/1/0435/3897/2831/files/faxisifotuworadozu.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_off000083d4.bin
a91c26e193bc89de741c4a4a487fa424c4a146277904c07e0d6d7968c4594300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D4 5296 bytes
font_01_sfnt_off000095bb.bin
084122ad3430a4ba015d2e99ac41aeab1196753ee7355a2caa48dda4c3132847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95BB 11380 bytes

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