Malicious PDF — malware analysis report

Static analysis result for SHA-256 3266a99ac9d40c9c…

MALICIOUS

PDF

34.7 KB Created: 2020-10-07 07:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1d0e3dc2bf1c63558da3098ca76c5a08 SHA-1: fff1c7a1f02499158499cd822793d42f9409baca SHA-256: 3266a99ac9d40c9c53e8489594be1393552704611c8388d795f8c761d8f43668
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains numerous embedded links. One link, 'https://ggtraff.ru/strik?keyword=ray+donovan+episode+guide+season+7', points to known malicious redirector infrastructure. The document also functions as a link farm, with many URLs pointing to disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to potentially harmful content. No scripts were extracted, but the presence of embedded URLs and the link farm behavior are strong indicators of malicious intent.

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://ggtraff.ru/strik?keyword=ray+donovan+episode+guide+season+7 In PDF document text
    • https://site-1039299.mozfiles.com/files/1039299/ninifunamuwajivolawinoj.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/57988816053.pdfIn PDF document text
    • https://site-1048166.mozfiles.com/files/1048166/fajimimipizukuvidupo.pdfIn PDF document text
    • https://site-1039266.mozfiles.com/files/1039266/19432969416.pdfIn PDF document text
    • https://site-1039390.mozfiles.com/files/1039390/28025333985.pdfIn PDF document text
    • http://puxukab.kathyknorman.com/uploads/1/3/1/4/131407537/747a0ae4515fc0.pdfIn PDF document text
    • http://files.insituvision.com/uploads/1/3/1/4/131437330/relofoxajiru-vasepifelivi-gawurudenevejek.pdfIn PDF document text
    • http://lisoz.davidgloverproductions.com/uploads/1/3/1/3/131398222/a35b19.pdfIn PDF document text
    • http://files.backcreekvcllc.com/uploads/1/3/1/8/131858916/3655434.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/8854b6ff-cdea-490c-9b79-a21eb7189c42/12922097430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654937c2-c257-438e-b13b-3a0d2c41abaa/17599110866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7726067e-8704-41dc-a974-b4acdf5fadb7/59827534672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96fd7788-34d1-4624-b150-e74417bfc201/32944200324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0788/7518/files/renajesiladevezomij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2763/0744/files/69584077050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/kevapimufip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/angela_duckworth_the_power_of_passion_and_perseverance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8024/0289/files/gta_5_apk_installer.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_off00004aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AEB 5248 bytes
SHA-256: ef859cb3981f790c159123baa6d7010a7acc9c4b3d568ccb385796e41a0ffca3
font_01_sfnt_off00005cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF6 9636 bytes
SHA-256: 2abeb35aaf935c900e3d00c828e7d7a755f8915d221b80e5a6e6312f86fd14c8

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