Malicious PDF — malware analysis report

Static analysis result for SHA-256 abef2dc7e8c4671d…

MALICIOUS

PDF

49.1 KB Created: 2020-07-30 16:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edcdbb482c7e987263107928c7b80c6e SHA-1: 2cbfa347047268d844ee1b5735a5e75a057cf40b SHA-256: abef2dc7e8c4671deac42f5956a2d94d6c37aac9117470f66a1d6bad525b0a31
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests an attempt to lure users to malicious sites. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a book title, indicating a potential lure for content. No scripts were extracted from this sample.

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=capra+cu+trei+iezi+ion+creanga+pdf
    • http://files.thekansasbeecompany.com/uploads/1/3/1/4/131454151/xuxupijubi.pdf
    • http://files.webblox.com/uploads/1/3/1/4/131437604/tabines.pdf
    • http://files.purefreedomwellness.com/uploads/1/3/1/8/131871814/5284117.pdf
    • http://files.skinboutique.shop/uploads/1/3/1/3/131380008/3896638.pdf
    • http://files.gorgeousslimes.com/uploads/1/3/1/1/131163920/rezoted.pdf
    • http://files.purefreedomwellness.com/uploads/1/3/1/8/1318
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/69037247651.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/bewasugifijakigisabe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/davixoligiwonosenu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7546/files/5850921858.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1079/files/xikogulitetolorikagavivul.pdf
    • https://cdn.shopify.com/s/files/1/0437/2270/2999/files/36318105892.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3183641906.pdf
    • https://cdn.shopify.com/s/files/1/0430/3136/3747/files/60719627027.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/luguboguluzeximoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/54711033198.pdf
    • https://cdn.shopify.com/s/files/1/0429/1257/9747/files/40299593558.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/71774833912.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008198.bin
e38a2b52e377d2ee8d030fd86d3eee8b4fd207a1c987ac7ed5da3bd189335fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8198 5068 bytes
font_01_sfnt_off000092ef.bin
18f2d0e9fe70e593e0ddac32af40c4941109d1dd392366c90a7c45169e44fee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92EF 11040 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.