Malicious PDF — malware analysis report

Static analysis result for SHA-256 8383966aefcbeb57…

MALICIOUS

PDF

33.7 KB Created: 2020-07-31 19:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f3c65d5c219ddb25fda2717296fa35a SHA-1: 582c8907526d7f297263564de4f53cc217ffe576 SHA-256: 8383966aefcbeb574a9731e2b789a07e344d786778ad6cedfa484b8546063191
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO spam campaign. One of the primary links, 'https://ttraff.cc/pify?keyword=photographs+and+memories+lyrics', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same malicious URL, indicating an attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the structure and embedded links strongly suggest a malicious intent to redirect users.

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.cc/pify?keyword=photographs+and+memories+lyrics
    • http://files.godfromatoz.com/uploads/1/3/0/8/130874691/vijodotije-mavovolovavitas-xoboruvipem-piporarulevoli.pdf
    • http://files.rthomascpa.com/uploads/1/3/1/4/131411542/3767682.pdf
    • http://files.milweeband.com/uploads/1/3/1/4/131407423/dazifinego.pdf
    • http://files.anzaborregopaleo.org/uploads/1/3/1/4/131438299/jibetilufi-tibokobijipur-jajuni.pdf
    • http://files.valleyrootsfoodhub.com/uploads/1/3/0/7/130740344/fa8b50ce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/51165492592.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/tiligerugukok.pdf
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/65774074077.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/radokugiwerotaves.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/kekagewesarorexogivoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/foparesonedewijawenuna.pdf
    • https://cdn.shopify.com/s/files/1/0436/5461/1102/files/56449838299.pdf
    • https://cdn.shopify.com/s/files/1/0428/4429/1228/files/16122409113.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0435/9759/4786/files/58991562723.pdf
    • https://cdn.shopify.com/s/files/1/0431/4729/6924/files/78627496239.pdf
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/jurutesowenumegaz.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_off00004500.bin
6bd1d6b2d213cafc0027a1ef7fada2e56e842753b74b99c7faf903c041807048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4500 5588 bytes
font_01_sfnt_off000057e0.bin
21f6932c722546a6e363c47799866a293af76806cb062f96e8b47f5c7deb4784		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E0 9940 bytes

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