Malicious PDF — malware analysis report

Static analysis result for SHA-256 016be286d076411c…

MALICIOUS

PDF

53.7 KB Created: 2020-08-08 10:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c7dd312ae7f7cbb81efea1a814b033f SHA-1: 73bd5774744b3805130c84106d029a190185c14b SHA-256: 016be286d076411c43e9570124d37d38e22bc0594f2570cbfaa0a2309c3e4008
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This indicates a likely attempt to lure users to malicious sites for phishing or malware delivery.

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=agr%25C3%25A9ger+plusieurs+pdf
    • http://files.linseyart.com/uploads/1/3/1/8/131871984/8332955.pdf
    • http://files.sydneyschiffdanceproject.com/uploads/1/3/2/6/132682739/ad45d3bb001d.pdf
    • http://files.artistsmakeupstudiodoha.com/uploads/1/3/2/8/132814969/sotixokejo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/lufisolazimodifapitix.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/83606779356.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/technical_documentation_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/18978352516.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/xajogomefinukebatimirit.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/cabanellas_diccionario.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/ibn_rushd_books_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/32947658508.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/67403749375.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/barepovofuvusas.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8190/files/89104466957.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b38.bin
5be7c3d9c13fd20e19b8b76e53d0b9d6429c03d6004528fbb568afad535072fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B38 5132 bytes
font_01_sfnt_off00008c7f.bin
310b6d99afde593876da8ecc44dd677c5bf3ab36eb8cef388cb83a1daf27428d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7F 11908 bytes
font_02_sfnt_off0000b206.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB206 16312 bytes

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