Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec9a28a78f30b29…

MALICIOUS

PDF

40.5 KB Created: 2020-10-09 01:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2e02b37f380d2dcac692c8b945f04227 SHA-1: d742037347e7bc9421d23a8c18f273f980b07108 SHA-256: 6ec9a28a78f30b2917f7452c8a8f36c5d572e75282e973a278576ba9d9c3441c
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, disguised with a search query for 'see through swimsuits plus size'. The document body itself is heavily obfuscated, but the presence of multiple links to disposable hosting and the ML classifier's high confidence score indicate a malicious intent. The primary goal appears to be directing users to malicious infrastructure.

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/pify?keyword=see+through+swimsuits+plus+size In PDF document text
    • http://files.kellygallagheririshdance.com/uploads/1/3/0/8/130873781/c6aaf3d.pdfIn PDF document text
    • http://files.acadianexotics.com/uploads/1/3/0/9/130969960/5451792.pdfIn PDF document text
    • http://povuxaf.nanoassembly.org/uploads/1/3/1/4/131406717/9161387.pdfIn PDF document text
    • http://files.soundofrigpa.nl/uploads/1/3/2/6/132681399/gogafiwi.pdfIn PDF document text
    • http://wegelu.astermaintenance.com/uploads/1/3/1/0/131071181/7900871.pdfIn PDF document text
    • http://rofalux.gentleqigong.net/uploads/1/3/1/3/131379538/gebudolamidadal-zukomevefijo-rawukove-jupizezanizosax.pdfIn PDF document text
    • http://files.printable-ebooks.com/uploads/1/3/1/4/131411024/70f155.pdfIn PDF document text
    • http://files.charlesvoysey.com/uploads/1/3/1/1/131163780/c8c99f7a04ea2c4.pdfIn PDF document text
    • http://files.nerdyphyseder.com/uploads/1/3/2/7/132740929/3822312.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/25c0399d-2133-4d41-8a2e-78430bc5c056/kibilalanubowano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab1fe64-e3b7-490b-852e-b985b2e5195f/85032204291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a09d66-d015-4271-bf86-391d8f4909b2/30496984155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50bb3733-5003-4d87-974f-c99883c36186/lifozuxusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094c631e-c1a9-4384-b806-8912bab952d8/24635438967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d764881d-ca45-44ee-9e29-0cd220312cf4/18440956494.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_off00005fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE2 5268 bytes
SHA-256: 51f485aac3fbc6768bb7ece542ad81e760db9f5764d74cd81063ab56164c654e
font_01_sfnt_off000071bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BD 10412 bytes
SHA-256: 16e3c3da12c55db5f85ecdd45b72abce630e69fc3d8ffcc37211293666678bdb

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