Malicious PDF — malware analysis report

Static analysis result for SHA-256 0613b459750ec0d6…

MALICIOUS

PDF

60.3 KB Created: 2020-10-13 13:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bbf3bb1658a8b6298eb3344e90ef30d9 SHA-1: 4ad2231f8b32fe934d9315c7b1dea88d3e825ce8 SHA-256: 0613b459750ec0d613a871d9d1e16051e23d47085375226888167937038ce8dc
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector. The document body, though heavily obfuscated, includes a URL that matches the malicious redirector found in the heuristics. This suggests the primary purpose of the PDF is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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=leishmaniose+visc%25C3%25A9rale+infantile+pdf In PDF document text
    • https://site-1041289.mozfiles.com/files/1041289/rekanawumodobegotajetefu.pdfIn PDF document text
    • https://site-1041695.mozfiles.com/files/1041695/91295997060.pdfIn PDF document text
    • https://site-1039503.mozfiles.com/files/1039503/85728815840.pdfIn PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/20562140161.pdfIn PDF document text
    • https://site-1039649.mozfiles.com/files/1039649/10958185334.pdfIn PDF document text
    • https://site-1039002.mozfiles.com/files/1039002/zirukigebaramik.pdfIn PDF document text
    • https://site-1036676.mozfiles.com/files/1036676/berivota.pdfIn PDF document text
    • https://site-1038471.mozfiles.com/files/1038471/depebewakewixufa.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/1/0488/0672/3749/files/61962003020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4396/5086/files/13301190478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e791c41-b392-4bad-bf94-53b9e92d1402/nevezusanagixilelegizetiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f82b538-a275-4f27-a35a-66c437fd17c0/wisojufuvabab.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 5

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_off0000a7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C7 5540 bytes
SHA-256: 4e2130a48f1bc58167410b858645d8b6a5f7a8d2812d562315c32ed2ed543c4d
font_01_sfnt_off0000ba32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA32 12940 bytes
SHA-256: 08741dd33cfb4ad887f35d786f99b2ec4628eb7145a42c71c6f49193a1c3ed0f

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