Malicious PDF — malware analysis report

Static analysis result for SHA-256 04719537d5206fec…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 20:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8111c4a0afabaa4c46e622a0503478ba SHA-1: 09c60940fb07e106eacf56db13006c1795fc56da SHA-256: 04719537d5206fec87040c3734257a8a999509a00669d66d0f43916fc18532ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary URL identified as a malicious redirector. The document body, though heavily obfuscated, contains the title 'El ambiente de la mercadotecnia' and the malicious URL, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=el+ambiente+de+la+mercadotecnia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/724bd4_fb5a3d3135014dcd9015c24916c9676e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f176fa14edcc4e20b800d4378513acbb.pdf
    • https://static.usrfiles.com/ugd/41f880_d0be9692e86a44528ada732d34a53174.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/avon_catalogue_january_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/dadomubezuvetex.pdf
    • https://static.usrfiles.com/ugd/432b07_afd4cf31ccbf442da1d7792fe590cf1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1af16ffb28e6454c916cbb9a6fc20157.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dc9ff70fd914d5fa4a2ff22bcb19ab2.pdf
    • https://static.usrfiles.com/ugd/b8c837_608f256606fc4cddb6c01466de91364c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1a0654b70ed4c788273c6c4335679f8.pdf
    • https://static.usrfiles.com/ugd/52b593_62faa23478b34299a659e2e29a3038c6.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_off00006366.bin
c9e1ac8f58b916f067cbe42a6910ead688f8936ffe039f62cac57b900ece0976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6366 5004 bytes
font_01_sfnt_off00007448.bin
44f6b0464ce6157590d49ef427e2fff732a32e6fb410ca1596a2f63cfd3d0fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7448 10208 bytes

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