Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d9f647abdca06d…

MALICIOUS

PDF

45.0 KB Created: 2020-08-14 20:39:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebfcd5dcf397cf956590313c4dbef374 SHA-1: ab2ad6d5c2e511ab0b1c36589b2e3986a73f47e0 SHA-256: 68d9f647abdca06d690ed09b15b1abb2b8a16478117039126c9480ed9f245b3a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a 'baby gate manual'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. 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.com/wb?keyword=regalo%20extra%20wide%20baby%20gate%20manual
    • http://files.professionalscissorsharpening.co.uk/uploads/1/3/1/4/131453188/6409a8b001d27.pdf
    • http://juveruto.torontogratitude.org/uploads/1/3/0/8/130814575/6388709.pdf
    • http://jided.apollopresby.org/uploads/1/3/1/4/131453990/eb3bcdd0a.pdf
    • http://files.sri.vn/uploads/1/3/2/8/132815791/179ab7de0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/25858647030.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/55701137442.pdf
    • https://cdn.shopify.com/s/files/1/0434/0767/1448/files/secured_party_creditor_forms.pdf
    • https://cdn.shopify.com/s/files/1/0434/0449/2965/files/autotune_8_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/70024905046.pdf
    • https://cdn.shopify.com/s/files/1/0439/3277/8651/files/ufw_port_forwarding.pdf
    • https://cdn.shopify.com/s/files/1/0452/6043/9713/files/flames_of_war_vietnam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9601/5002/files/65185268784.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/analisis_pestel_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/78996762908.pdf
    • https://cdn.shopify.com/s/files/1/0432/8285/8144/files/introduction_to_solid_state_physics_kittel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0167/files/jeppesen_private_pilot.pdf
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/xavoju.pdf
    • https://cdn.shopify.com/s/files/1/0434/4076/7132/files/import_google_font_stylesheet.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_off0000719a.bin
c2458c9b3078fc10c21be52d0f07bfb511bd338af81e0701d63e16d75f749980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719A 5376 bytes
font_01_sfnt_off000083ec.bin
a8fe93932d64cdb83bf468923dfd97ef56746081355d84dc555876d624972fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83EC 10052 bytes

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