Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee47abfa271c146…

MALICIOUS

PDF

40.6 KB Created: 2020-10-02 11:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e2614873c51c1704d89a2769f1daef2d SHA-1: e0938e0531b7c2483422a3f5fded750bc8b1d0d3 SHA-256: 1ee47abfa271c146f5931d945fcdb2b4dbe59282ed15672d3bdae0bff28de5d4
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirect to malicious infrastructure. The primary malicious URL identified is https://cctraff.ru/strik?keyword=woolworths+erskineville+opening, which is flagged as a redirector to malicious content. The document's structure and link farm nature suggest it is designed to lure users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=woolworths+erskineville+opening In PDF document text
    • https://site-1038944.mozfiles.com/files/1038944/webiwipom.pdfIn PDF document text
    • https://site-1040171.mozfiles.com/files/1040171/68767605853.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/17064086220.pdfIn PDF document text
    • http://files.jenwalls.com/uploads/1/3/0/8/130813906/ronizukenowinak-meneruvub-lelagomamonudan.pdfIn PDF document text
    • http://files.principa-book.com/uploads/1/3/2/3/132303219/e884f0869c07.pdfIn PDF document text
    • http://files.bereavementconnection.com/uploads/1/3/0/7/130739369/mofuporag.pdfIn PDF document text
    • http://files.barrywenger.com/uploads/1/3/0/8/130874328/fojotajepokomi.pdfIn PDF document text
    • http://files.walden-wonders.com/uploads/1/3/0/7/130740175/5dd055f7f747e1d.pdfIn PDF document text
    • http://files.puttdoctor.com/uploads/1/3/1/3/131383297/tesidepuzoda-lufolopuwivivag-mesofojut.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/d708121c-356b-4934-84e3-a23c1074ba00/83682697061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af93968-96a6-4498-b693-78281f99f232/zusupanine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a4f3b3-18e4-4b6a-b66d-91dc19e3caca/64665057644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9473421b-3b02-446a-afbb-a6322ed87296/wozezizakofodu.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_off00005fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBE 5100 bytes
SHA-256: a6fbc60d7da11a866151163da6df4c37dd062d1fed221d10550344a393b67cfc
font_01_sfnt_off00007131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7131 10896 bytes
SHA-256: b28fad2a93c2645bfabc8cab70fbcb9eee2a31d815873c78df2b61056cc18f88

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