Malicious PDF — malware analysis report

Static analysis result for SHA-256 3323a603559629eb…

MALICIOUS

PDF

43.3 KB Created: 2020-10-14 21:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bd64003610274662851eb3294b861e40 SHA-1: 2650eaf21033f5ec4132f3e91ca584a157733482 SHA-256: 3323a603559629ebb538940de833da51dd761afc1770a6dde206667990c243ee
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high number of external links, many of which point to benign content hosting sites, but one critical link directs to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ggtraff.ru/strik?keyword=manual+de+asepsia+y+antisepsia+pdf', which is flagged as malicious. This suggests the PDF is part of an SEO link farm designed to redirect users to malicious 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 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/strik?keyword=manual+de+asepsia+y+antisepsia+pdf In PDF document text
    • https://site-1039505.mozfiles.com/files/1039505/tavirarizewunelam.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/miwuxelo-kikukiroli-vitijataw.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.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/1/0496/2910/2244/files/flutterbye_fairy_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1871/7864/files/22059457701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6976/6302/files/otet_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1123/6259/files/auditing_and_assurance_services_16th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9704/0067/files/fumivebab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01fb45b8-419d-4145-aca4-3d55f7986b5d/87314245227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069e46ee-ad5c-48f9-b944-ce90cf60b8a0/xavesowupavuwakiwosiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2980873e-c719-4eed-a12f-64d7f8640592/baruniwazogajeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14846293-7989-40f1-93d7-eb579603aac5/xalawowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47565b58-9e53-4de0-a06e-9243c7444ff4/41938168952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4f62089-acca-4012-ae3b-5709f970a127/229312744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f80193-7959-48b1-bee9-27f5211c31bc/1895908570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3874/2440/files/76688423407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8192/7318/files/40158142391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1388/0483/files/90014444432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/373564683.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A9 5044 bytes
SHA-256: e4541512cf5d60bcebebd641d455401876ca11bb0fcbdd978b04f6710ebedf50
font_01_sfnt_off00007af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF7 10712 bytes
SHA-256: 1d00b32fed309aba9425440c4ad21e90750d16937742202fa6f973c253fbca95

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