Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b2349af55fbc2c…

MALICIOUS

PDF

216.9 KB Created: 2020-08-17 10:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2446918992057a396c1cd37ec67204e SHA-1: d421d43be44c26d596fd6497c845735857483423 SHA-256: 62b2349af55fbc2cf3638b9286e404a3b5d41f32ead2c6268ca7101bc7d142a2
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 3

  • 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.
  • 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=detective+conan+episode+guide
    • http://files.elaresources.com/uploads/1/3/0/7/130740217/2308425.pdf
    • http://files.journeytolegacy.com/uploads/1/3/1/3/131379844/2809249.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0655/7340/files/ketogene_ernaehrung_bei_krebs.pdf
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/gosimo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7746/files/17927845072.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/55957544074.pdf
    • https://cdn.shopify.com/s/files/1/0439/5981/2254/files/rasabuxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/gudejezeviwese.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/zesotodorivetesoto.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/supofitokopa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0002ad0b.bin
15bfc8cebe1d46f9e1ef8b0748b11b1bdf6fc03eed27f1fbf372f7634a80b5d6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AD0B 30216 bytes
font_01_sfnt_off00030a6a.bin
444c52d3cf11971c43aa23e132a14d6c1262ea0f834d3d48de6e3858287a4917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30A6A 5172 bytes
font_02_sfnt_off00031c17.bin
7ef28e35298b69e7404a6f0a92b7d0fba9d8b7d63688c096db7c3494c8003fb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31C17 18420 bytes

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