Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e96bf444fc0ff15…

MALICIOUS

PDF

42.7 KB Created: 2020-10-29 17:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14de5ba05328c288fbc19b77b7b3cfe0 SHA-1: 7f146f071b1c9aa23a14ee98935b7bd426cff64b SHA-256: 7e96bf444fc0ff1574dd874af2d5e1f96d950550083fcd792bf3898e32895fef
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though partially corrupted, suggests a lure related to 'different types of guns and their uses' to entice clicks. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/123?keyword=different+types+of+guns+and+their+uses
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5f9a6dbb82cd0.pdf
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f93de1da904d.pdf
    • https://cdn-cms.f-static.net/uploads/4414156/normal_5f9557b23a0e9.pdf
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5f94631853ea9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0268/7598/6096/files/zedigewizikov.pdf
    • https://cdn.shopify.com/s/files/1/0439/5958/2878/files/real_steel_wrb_mod_apk_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0507/8532/1154/files/57478778413.pdf
    • https://cdn.shopify.com/s/files/1/0495/9751/3895/files/27243906705.pdf
    • https://s3.amazonaws.com/dinigugaxej/maternity_clothing_allowance_navy.pdf
    • https://cdn.shopify.com/s/files/1/0432/4864/8354/files/essentials_of_food_sanitation.pdf
    • https://cdn.shopify.com/s/files/1/0502/9871/6324/files/tokuzolawat.pdf
    • https://s3.amazonaws.com/felasorarabipis/20548515473.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/threatened_abortion_nice_guidelines.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_off00006879.bin
927e0ebceab3982e08f58c90c8f795874990942ce5faa0a08f60db5b1447fd4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 5372 bytes
font_01_sfnt_off00007acf.bin
38db6583e37583d15b4598740bdf006ea1ea790cdf2ab3e103653dab6cd79711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACF 10276 bytes

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