Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b30efd9d293425…

MALICIOUS

PDF

42.2 KB Created: 2020-08-08 18:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e11a9bf6224ac6b1c3150348c1c1cc5 SHA-1: e3f4671a27c632ef13e018fb3aa031206fc1384f SHA-256: 16b30efd9d293425c71f4118c556af8c1d3e627f55289ea3ae384da61ac11e76
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, masquerading as a French book PDF, which lead to a link farm and a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of a redirector to 'ttraff.ru' suggests an attempt to lead the user to a malicious site for further exploitation. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or redirection attack.

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.ru/pify?keyword=c+est+genial+french+book+pdf
    • http://webemi.pyrfectlyhandmade.com/uploads/1/3/0/9/130969573/nogitigago.pdf
    • http://files.thebetterbrasspipe.com/uploads/1/3/2/7/132740218/daf3e1d8396c143.pdf
    • http://files.solopipingjudges.co.uk/uploads/1/3/0/7/130775971/7342805.pdf
    • http://files.amazingamericanstv.com/uploads/1/3/0/7/130739886/2760298.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/human_pathology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/coraline_reading_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/kemonafonekuvovif.pdf
    • https://cdn.shopify.com/s/files/1/0436/1424/0931/files/breast_cancer_screening_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0440/7109/2376/files/dabolubonejutufi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1733/files/japawivesulajebeloxidiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/90768163338.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1723/files/fujiruru.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/libros_de_superacion_personal.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/pugopodagot.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/98581696135.pdf
    • https://cdn.shopify.com/s/files/1/0441/3983/9640/files/51105973227.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_off00004fee.bin
69d67be2043ef2086cbc96cc0a0fc031e6805e0decc93f639b6b0210c7e7873f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEE 5524 bytes
font_01_sfnt_off000062a8.bin
ab47b6ae04e24e751e871d1c7417db3d896ed4f44a7805c1ec66e4fc90322c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 10612 bytes
font_02_sfnt_off00008717.bin
1f10eee925fbe99070ce930aad2781db9cd53dceef6a88ee5d5c61933f6ad089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8717 16068 bytes

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