Malicious PDF — malware analysis report

Static analysis result for SHA-256 167963aee7de6011…

MALICIOUS

PDF

239.3 KB Created: 2020-08-19 09:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33af32eb006eb73567cbdaefe0d7ed5b SHA-1: efe1a86f273b5507aaecb9277639fac6a3785e4d SHA-256: 167963aee7de6011abe2448cf59e5179c306ac47c88e7ae3cf27821b0af9b87a
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL is a redirector designed to lead users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ttraff.com/pify?keyword=historia+de+la+independencia+de+mexico+pdf
    • http://files.rmhsasb.org/uploads/1/3/1/8/131857115/xexerugebegukude.pdf
    • http://vosawile.hk100-ultra.com/uploads/1/3/0/7/130776499/527182.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5169/6796/files/pectus_deformity_of_the_sternum.pdf
    • https://cdn.shopify.com/s/files/1/0439/3123/8568/files/defuxutalenobewagewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/98528997250.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/22383115992.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/assistive_touch_hack_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/57619260889.pdf
    • https://cdn.shopify.com/s/files/1/0449/4488/3880/files/bhai_movie_songs_._com.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0448/3517/6608/files/seismic_unix_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bapumonotirugapagemuzigin.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/26999865289.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_off000374cb.bin
312878e1273813e7897da893b2a9372fed3c77f37bb9e6676a6d0c25b74daf38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x374CB 5332 bytes
font_01_sfnt_off000386cc.bin
4aa09507a15e4a80724e034bcfacc22489e5ee72aaf0237d5206433327d2d5c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x386CC 11920 bytes

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