Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d607274b2fc8db…

MALICIOUS

PDF

41.0 KB Created: 2020-10-05 01:40:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 166a2afa101e36884ef71bcb32d24eeb SHA-1: f974a86f211442082fb0c311d375d90fcaa9155f SHA-256: d6d607274b2fc8dbc8f9c1f82479253eaed5ec2ce4132138227b1fa2b76723d9
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/strik?keyword=yakari+%25C3%25A7izgi+filmi+m%25C3%25BCzi%25C4%259Fi'. This heuristic, combined with the ML classifier's high confidence, indicates the document is designed to lure users to malicious sites. The document body itself is heavily obfuscated and contains a mix of garbage data and URLs, further supporting the malicious intent.

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://ggtraff.ru/strik?keyword=yakari+%25C3%25A7izgi+filmi+m%25C3%25BCzi%25C4%259Fi In PDF document text
    • http://files.ggmga.org/uploads/1/3/2/7/132740905/2476334.pdfIn PDF document text
    • http://zefavupu.sharprentalsllc.com/uploads/1/3/2/6/132681887/6828867.pdfIn PDF document text
    • http://xonenu.triplehhunting.com/uploads/1/3/0/9/130969754/7204285.pdfIn PDF document text
    • http://luboxifi.artsburg.ca/uploads/1/3/2/3/132303286/13771b2e63fb9.pdfIn PDF document text
    • http://panumo.seekingthingsabove.com/uploads/1/3/1/6/131607919/fukerumufifobagubow.pdfIn PDF document text
    • https://site-1040977.mozfiles.com/files/1040977/758898498.pdfIn PDF document text
    • https://site-1039885.mozfiles.com/files/1039885/19273907365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/9538/2174/files/bizosagewedirezed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3744/5274/files/cherokee_16_cinemas_woodstock_ga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7665/8087/files/ponte_knit_fabric_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2847/5812/files/57363329567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81705f87-e0d5-46fe-92a7-c5b0832c8acf/wunezolujofelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6e754c9-409c-4e4d-abf0-23f34f0206eb/92159797245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f64a40-80de-4840-9d3d-db1037f5f71a/vetijakutuzetaleke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e73606-0574-4124-b874-ca8fd4d837a9/38550865629.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_off00006184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 5516 bytes
SHA-256: cfe67e6df6aa8f3c6f01254a9441a2fb46ce98fd754233adf2a204239b6df3a6
font_01_sfnt_off00007399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7399 10888 bytes
SHA-256: f4018ddc01b730b959b3f48388760a981c227c35a6cc397d6d767f42e159618d

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