Malicious PDF — malware analysis report

Static analysis result for SHA-256 7310b3de66850470…

MALICIOUS

PDF

42.8 KB Created: 2020-08-17 05:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca39c60565369a2fe5b64ffb1722f91 SHA-1: 46c3f2bd3ba29dd79448fae13e64a2127bfeb23e SHA-256: 7310b3de66850470c7fd1ed20f67fd19440370c2225ad0ebe9edda3d59682b04
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at `https://ttraff.com/pify?keyword=telecharger+bible+aelf+pdf`. The document body, though heavily obfuscated, contains text related to downloading a Bible PDF, suggesting a lure for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=telecharger+bible+aelf+pdf
    • http://bigubad.pamswaycreations.com/uploads/1/3/2/6/132695832/potima_wuxotov.pdf
    • http://files.solanocanyon.org/uploads/1/3/1/0/131070246/6552027.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/9740108062.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/kamotatewawexikofazij.pdf
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/20470912583.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/tazusogimiwixitebeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/vawadiledupev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/xejuvazukajudel.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/js_games_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/scheduled_caste_list_in_up.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/diccionario_espaol_catalan_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47171602999.pdf
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/halcones_de_venta_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0429/8876/5337/files/kiran_publication_bank_clerk_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/jzyk_angielski_czasy_wiczenia_do_druku.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_off00006815.bin
6aae8cbc21f6b71988e272859105ec9bddd5e964826c17537ce0e3dc89b2b1fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6815 5328 bytes
font_01_sfnt_off00007a27.bin
460a7f38302deeefef585490a8be04ec1cf901f11fb27a66a52ac2191ea02e39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A27 10492 bytes

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