Malicious PDF — malware analysis report

Static analysis result for SHA-256 60619b7739562937…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 05:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 417b8c7c7fe13568869a0f5c247f6ce6 SHA-1: ae46212d87694b128cfb7bf2afb7cf6e8118dcb4 SHA-256: 60619b7739562937f93e8c67b77af2a6f68b196f3a7b49edd3dbde88ec3bb9ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Arabic words for beginners pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicated maliciousness.

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=arabic+words+for+beginners+pdf
    • http://files.buckinjdesigns.com/uploads/1/3/1/0/131070080/xuniliv.pdf
    • http://files.otterworksusa.com/uploads/1/3/1/4/131437351/tasegus-rekafi-zeganusisaj-jigavulef.pdf
    • http://fomari.virtualbackgroundsphotography.com/uploads/1/3/1/3/131398097/lamagirepulu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7328/9894/files/aceptacin_positiva_incondicional.pdf
    • https://cdn.shopify.com/s/files/1/0434/0174/0439/files/68167142706.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/befuzavitaviruma.pdf
    • https://cdn.shopify.com/s/files/1/0440/1994/1541/files/15943770955.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/lesifugonotujerurupur.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/47486165853.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/zudinemibemibepa.pdf
    • https://cdn.shopify.com/s/files/1/0440/3331/0870/files/juresitutenimivovet.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/59141473005.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/vufigabedof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/67876777119.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/dagimeliwoloxir.pdf
    • https://cdn.shopify.com/s/files/1/0448/9094/7739/files/libro_el_criticon_baltasar_gracian.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/mijugetabofisiwujajuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7696/0924/files/68732071697.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_off000065c9.bin
0e372733a683f55bf0242f2bc9a4d10da7c229494f38c0ae6bf2cadca81476d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C9 5512 bytes
font_01_sfnt_off0000789c.bin
6aab4cf749992fc67b069ece8697eed6626b3f432a820821ddf6219f781b8195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789C 9920 bytes

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