Malicious PDF — malware analysis report

Static analysis result for SHA-256 14781296724565cd…

MALICIOUS

PDF

68.0 KB Created: 2020-08-09 19:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84c4135e8db16ee9aecbf33d1bc50481 SHA-1: f4bf2db0796ab24d276cdd34a17f697402082c74 SHA-256: 14781296724565cda648b996664a846c871cabc1474a4800d9ec709be8c16b15
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=anlodipino+mecanismo+de+a%25C3%25A7%25C3%25A3o+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to redirect the user to malicious content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=anlodipino+mecanismo+de+a%25C3%25A7%25C3%25A3o+pdf
    • http://files.southaustintkd.com/uploads/1/3/1/4/131453902/demosabowir_banubonez_tuzorod.pdf
    • http://files.ww2.thumbprintgallerysd.com/uploads/1/3/2/3/132303163/5b8b2a0.pdf
    • http://files.islandparkpreservationcoalition.org/uploads/1/3/1/3/131398095/6192131.pdf
    • http://files.tetzlaffmusic.org/uploads/1/3/0/7/130739430/gelotuzizukuz.pdf
    • http://files.amnesialab.org/uploads/1/3/0/7/130775850/gegajotoro_wilinako_womolu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3810/3962/files/93013987522.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/rovuzebafafadov.pdf
    • https://cdn.shopify.com/s/files/1/0453/8662/9288/files/baofeng_uv_9r_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/vudukakamuwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7992/files/barrett_values_centre.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/17706407895.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/napivodomum.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/casio_f_91w_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/basic_book_of_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/74510411182.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/jeguwusanurov.pdf
    • https://cdn.shopify.com/s/files/1/0444/2020/2663/files/mozifenawebiwoxeger.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/91575897628.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_off0000c175.bin
5b1113922478f298d3aaf30dd154171aa09379ee8b6677e716abf6fdabc66203		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC175 5696 bytes
font_01_sfnt_off0000d3ea.bin
2934dab0c1fb8519d97a47cccbb2f59d48e9924b117b97972c916b91bfcf75d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EA 15652 bytes

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