Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5fff2d37ec509c…

MALICIOUS

PDF

33.2 KB Created: 2020-10-06 22:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1c8a47f114334db7d2a141ae916d273d SHA-1: 69b9bf14c7a0be7d6232b6dce2a92e34591772fc SHA-256: ae5fff2d37ec509cd729a2de4ac69c95992e0cc431a24bb2b63983d734299f7d
124 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to malicious infrastructure, likely as part of a phishing or scam campaign. The embedded URL `https://cctraff.ru/strik?keyword=imagine+john+lennon+mp4+free+downloa` is identified as a malicious redirector. The document's structure and embedded links suggest it is designed to trick users into downloading further malicious content or visiting compromised 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=imagine+john+lennon+mp4+free+downloa In PDF document text
    • http://files.laughalotpaintandsip.com/uploads/1/3/0/8/130814355/3643247.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/xererafowobizexazijuduzof.pdfIn PDF document text
    • https://site-1043377.mozfiles.com/files/1043377/27442884633.pdfIn PDF document text
    • https://site-1042010.mozfiles.com/files/1042010/litotupavomaleri.pdfIn PDF document text
    • https://site-1038409.mozfiles.com/files/1038409/48487509849.pdfIn PDF document text
    • https://site-1038799.mozfiles.com/files/1038799/kasan.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/witavowedubibusi.pdfIn PDF document text
    • https://site-1040080.mozfiles.com/files/1040080/nazus.pdfIn PDF document text
    • https://site-1040171.mozfiles.com/files/1040171/supakuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae7bc706-92dc-4b2d-95bb-657fba9d75f3/fibitazazuwemavexijewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee115ae2-d021-4171-af30-91005b5acec3/lukotoxodixurozojusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb8e38d-d29e-4de2-ab72-da347c37b627/23596750853.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000441d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x441D 5472 bytes
SHA-256: 2c8b4cb8549b39d98d33a1b4f4672ee01842fb69a5c7bd6e5ae1d82fd71f6132
font_01_sfnt_off000056aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56AA 9784 bytes
SHA-256: 8b7f03bde23d034665bc85a2bccb2198188d1b9e13d91a60d2d8d995d0db8ed7

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