Malicious PDF — malware analysis report

Static analysis result for SHA-256 a607b731b557c44e…

MALICIOUS

PDF

217.4 KB Created: 2020-10-11 11:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0bef2e38508a2ff699e96a21dcb7cba2 SHA-1: 68f42d768836c0be3bcc24881b28279035f4732b SHA-256: a607b731b557c44ef7a3b45bce876d7cc1e2b27d00da7160a13043996c81c9bc
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/pify?keyword=ss+guide+rod+shield'. This URL is embedded within the document body, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/pify?keyword=ss+guide+rod+shield In PDF document text
    • http://taxig.kempasjw.com/uploads/1/3/1/0/131070602/6554076.pdfIn PDF document text
    • http://kijiji.nigelbeebe.com/uploads/1/3/2/6/132681790/10d33db27.pdfIn PDF document text
    • https://site-1038310.mozfiles.com/files/1038310/2495434129.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/bovogulake.pdfIn PDF document text
    • http://files.performingmonkies.com/uploads/1/3/2/6/132682694/7771d928aea0fb9.pdfIn PDF document text
    • http://files.softballandsnakes.com/uploads/1/3/1/4/131437254/d8b0c0ddb57d70d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8373/4943/files/96723634744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7291/6118/files/biwixodigelixifutubog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6616/2837/files/94960108055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/bebogobos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9074/7295/files/mcgraw_hill_php_complete_reference_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000320fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320FC 4980 bytes
SHA-256: 690ed39ba09b098ae62ccc4b5ab2bdc36373a83357fc4cb7584ac614834ce166
font_01_sfnt_off000331da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x331DA 11312 bytes
SHA-256: a7242408441a13548959bf378cc336910a934af81226cef83ebc1632cf378ef4