Malicious PDF — malware analysis report

Static analysis result for SHA-256 38704d4c01c172d9…

MALICIOUS

PDF

51.2 KB Created: 2020-10-11 22:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4d98bec3eefcbe9049ab8a56b9924083 SHA-1: b2f03a272b1e287f26a4917df53086332993e441 SHA-256: 38704d4c01c172d91f1610d7ca8c626ab9aacb4e32301800a72204ef94ec7a2e
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a known malicious redirector. The ML classifier strongly indicated maliciousness, and the document's structure suggests it functions as a link farm designed to direct users to potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be the exploitation of user trust through deceptive links.

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://gettraff.ru/strik?keyword=modelo+de+comunicacion+de+raymond+nixon In PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/kurexepebevasisofum.pdfIn PDF document text
    • https://site-1044474.mozfiles.com/files/1044474/46045046862.pdfIn PDF document text
    • https://site-1048536.mozfiles.com/files/1048536/zowaw.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/dagunagamu.pdfIn PDF document text
    • https://site-1043395.mozfiles.com/files/1043395/7972100226.pdfIn PDF document text
    • https://site-1037886.mozfiles.com/files/1037886/gezefevon.pdfIn PDF document text
    • https://site-1043381.mozfiles.com/files/1043381/muxiwi.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/29370727872.pdfIn PDF document text
    • http://nimolo.barefoottofino.com/uploads/1/3/2/7/132741009/8569925.pdfIn PDF document text
    • http://files.reedleyfullgospel.com/uploads/1/3/1/0/131070859/8370472.pdfIn PDF document text
    • http://files.greensboroacrepair.com/uploads/1/3/1/8/131858540/duxizomifawoxojigub.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/c6182869-9b48-43fa-aedb-324dd790f01f/27857902390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69dae65-5bc1-4d9a-ae2c-e11279fe22b3/jimiregub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D11 5084 bytes
SHA-256: 21d21dd8f36252b7f6adeaffa78ed1bc8ee031627943979e014f008078e35a76
font_01_sfnt_off00008e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4B 2048 bytes
SHA-256: 5bbfb71e7e79db7713d2dca3d61a529cd6bdf2162d19a91745b024a6fee9cfc1
font_02_sfnt_off00009728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 11824 bytes
SHA-256: 2023b1e23ff3a3dab325c1d09ba5f3f38dfa1c596c7c411d1e33bfe3ef98581a

Open this report in the interactive analyzer, or submit your own file for analysis.