Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9283aed55d5fbf…

MALICIOUS

PDF

93.0 KB Created: 2021-01-09 09:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7388b23fd6df2f494a0f10a4536417ea SHA-1: e77782282bb3b755ab86e34f29602938e3c40af4 SHA-256: ca9283aed55d5fbf4ca1c679c72410a8fc6f5405f2f143a76d6d63ba0b4e0549
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a redirector and a link farm. The primary malicious URL, https://ggtraff.ru/123, is flagged as a known malicious redirector. The document body is heavily obfuscated, but the presence of embedded links and the heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=indus+river+map+in+pakistan
    • https://xiwajuropoji.weebly.com/uploads/1/3/4/3/134371127/59099673.pdf
    • https://pivorexivasij.weebly.com/uploads/1/3/4/4/134489734/317203d.pdf
    • https://wozagadukuwa.weebly.com/uploads/1/3/4/4/134483903/4448764.pdf
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/2295376.pdf
    • https://cdn.sqhk.co/kixarozikej/rryZihW/rocketman_songs_all_elton_john.pdf
    • https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/d7f11ff4d.pdf
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/konazumobifaw-vigureno-mosigokanis.pdf
    • https://cdn.sqhk.co/dajebala/nJgjijB/nexurade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/retobifulipo/nasm_manual.pdf
    • https://s3.amazonaws.com/turip/paxuxutefuwajexosine.pdf
    • https://uploads.strikinglycdn.com/files/7753ee7d-5ffd-4686-ad04-0ad798da4bf2/14064151651.pdf
    • https://s3.amazonaws.com/henghuili-files/kudelixeniviroruwizurakun.pdf
    • https://uploads.strikinglycdn.com/files/fc349fee-361b-44e8-ae26-5e0993155b34/fumuferapowagidaf.pdf
    • https://s3.amazonaws.com/toniseligiwuzux/diagnosis_of_rheumatoid_arthritis_guidelines.pdf
    • https://s3.amazonaws.com/divikufifir/58881506072.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_off00013096.bin
e4d3d0786f59028b6dad212b6f513b31432ef6d09b73f4fdbec2751009bb805b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13096 5136 bytes
font_01_sfnt_off000141fb.bin
bd68b8ac7e381f87be0d31f0fe3c75b315e4cec47e1e3821a0db9d0033808c2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x141FB 11056 bytes