Malicious PDF — malware analysis report

Static analysis result for SHA-256 057d503b6647caad…

MALICIOUS

PDF

44.0 KB Created: 2020-08-26 01:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e1aab66952f0d879dc6daaf00baadc7 SHA-1: b7cab3a3a6b12704e8a2fbe4cf9a8561c0ea7d73 SHA-256: 057d503b6647caad40a1a30697de1dacedac0456936e02cb0ff8cbaf00830702
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, https://ttraff.ru/pify?keyword=god+s+chaos+candidate, is identified as a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites.

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=god+s+chaos+candidate
    • http://fugumozu.productivefocus.com/uploads/1/3/1/4/131483147/8158414.pdf
    • http://jugib.pershoretownplan.co.uk/uploads/1/3/0/7/130776485/74f750d85af.pdf
    • http://files.conqmusic.com/uploads/1/3/2/6/132695321/wezovi-piwedijevol-bapipixupalede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/76275485028.pdf
    • https://cdn.shopify.com/s/files/1/0462/5170/4469/files/zuzabalobelesizemeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9403/3055/files/gokejeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekutaxawiwasutoxojopelor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/18595631016.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pidepuwavulosetanujerepub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2519/3368/files/yahoo_browser_windows_8.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0392/files/xokijo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/laboratory_guide_for_identification_of_plant_pathogenic_bacteria_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/chocolaty_jawani_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/amido_em_alimentos.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
font_00_sfnt_off000061c9.bin
9667af71e4f3be3fc24ebbbf9be1b1d89c84d69cd9217e57b7fd607cb5a196f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 4716 bytes
font_01_sfnt_off000071c5.bin
a743dc54f319c90a44c353507a42367477f1dc26e7c78753ab398fafb8f1281f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C5 10292 bytes
font_02_sfnt_off00009508.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9508 4324 bytes

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