Malicious PDF — malware analysis report

Static analysis result for SHA-256 96173bce26015875…

MALICIOUS

PDF

42.1 KB Created: 2020-10-08 16:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e63cbf6f0504dceb19deac3408e48ef5 SHA-1: add1ff24d34cb703ba959c092082a8d9fde12233 SHA-256: 96173bce26015875b073aacbe1862f35658ce63a6b3eccf9a3e9e126f65f5339
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, and one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a link farm or phishing attempt, potentially leading to further malicious content or exploitation.

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://ttraff.club/pify?keyword=bose+wave+manual In PDF document text
    • https://site-1041609.mozfiles.com/files/1041609/62008001565.pdfIn PDF document text
    • https://site-1040143.mozfiles.com/files/1040143/10227722936.pdfIn PDF document text
    • https://site-1036694.mozfiles.com/files/1036694/64447113659.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/8424693085.pdfIn PDF document text
    • http://files.bethmaries.com/uploads/1/3/2/6/132682585/todanubo.pdfIn PDF document text
    • http://jakekawev.1beautifulyou.com/uploads/1/3/0/9/130969242/wisodora-puwezisaged.pdfIn PDF document text
    • http://wupabekob.carossell.com/uploads/1/3/0/8/130874493/7184723.pdfIn PDF document text
    • http://files.cuctf.com/uploads/1/3/0/8/130873989/2ca8d3e.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/8e62d231-8c3a-4e02-b585-8af446e2517a/21152724326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d06655b-5124-469b-83cd-16d9b84e4d13/tixopoxap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e27d479-5b91-4138-92f8-9f35b50a7c20/sajulobabuserila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ce081d-65db-4f36-bace-bc0d8a9f6c06/45432916348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a97b16-37fa-4b90-b98e-e8406ba34e1d/75244717832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e2efdf9-03b6-4f96-85a6-4f95f5e3d76e/68127391798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0717546c-e0a5-4450-aada-96213248fe7d/solubonufopazitijod.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_off000066f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 4936 bytes
SHA-256: df0a26d8dab6e8fb02641718b13fecc1cce9b02e5bffd82c68f39916dd05d43b
font_01_sfnt_off000077c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C8 10636 bytes
SHA-256: 1bcb3e5d576c211a7d1aa6a1e27417487107e7483c4ecec54c8331b399d07d76

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