Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2472f0f0760e86…

MALICIOUS

PDF

680.8 KB Created: 2020-08-28 15:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13f567122e7b671973bdbd14ead63f2d SHA-1: b5eaaf614bb6f81649dc674725603d8dae160913 SHA-256: 9b2472f0f0760e86249f9b77da14feadf1efad664f5305d5e24f35de39d3fc15
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely intended to lure the user to a malicious site, potentially for phishing or to download further malware. The document body, though heavily obfuscated, contains the same malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9036

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=dietas+normales+y+terapeuticas+desca
    • http://jarexu.ccpublicschoolsdance.com/uploads/1/3/0/8/130874540/fozumutomed_dukobopakiveli_zijibiz_debewid.pdf
    • https://cdn.shopify.com/s/files/1/0439/4467/3448/files/82046664265.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/56401391752.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/66315275452.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/49842421486.pdf
    • https://cdn.shopify.com/s/files/1/0429/4790/3644/files/jefuruf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4124/files/anemia_por_celulas_falciformes.pdf
    • https://cdn.shopify.com/s/files/1/0434/4882/8065/files/97614295975.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/six_flags_over_texas_map.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000a433b.bin
61cfd8ae1a36702c168e26f0ec26eb4e1ff6b916293737a93ee42b478f9a19e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA433B 5320 bytes
font_01_sfnt_off000a5548.bin
bdd2dd680650273afd1769b24222052d513cc46b318ff0754ebc19115f1e1b3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5548 19980 bytes

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