Malicious PDF — malware analysis report

Static analysis result for SHA-256 2621b5462f86dd52…

MALICIOUS

PDF

60.8 KB Created: 2020-10-05 21:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 42f784597ff17ea5047e3ebc6d79a7b2 SHA-1: f0bf2733fab12667cb0f6a7b3269df4a3e2a546d SHA-256: 2621b5462f86dd528956710ddb3a97a7843cf15fdc17ac51ef9980eee7293a5e
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, cctraff.ru, which is flagged as a redirector. The document body, though heavily obfuscated, contains a reference to the same malicious URL. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lure 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://cctraff.ru/pify?keyword=sbcc+academic+calendar+2019-20 In PDF document text
    • http://files.evergreenpark1171.org/uploads/1/3/0/7/130776674/fd3a93b273.pdfIn PDF document text
    • http://files.everalearner.com/uploads/1/3/0/7/130776074/durazise-mirupu-sadijenop.pdfIn PDF document text
    • http://pijeboner.casadeartegallery.com/uploads/1/3/1/6/131636612/1462444.pdfIn PDF document text
    • http://xebaduw.premierdancecary.com/uploads/1/3/1/6/131607131/345f296fb.pdfIn PDF document text
    • http://files.unwhomecoming.com/uploads/1/3/2/6/132681579/df8d128f88.pdfIn PDF document text
    • https://site-1039431.mozfiles.com/files/1039431/34092946510.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/kajekojotanutolu.pdfIn PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/warupiwakivapulewenuvune.pdfIn PDF document text
    • https://site-1039797.mozfiles.com/files/1039797/joxunuwifav.pdfIn PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/logodaxazunivi.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/vagikamodezejup.pdfIn PDF document text
    • https://site-1041768.mozfiles.com/files/1041768/fekagi.pdfIn PDF document text
    • https://site-1037842.mozfiles.com/files/1037842/miduxisupe.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/d558686a-6f44-4c6e-9509-2c59b4f15ca9/kixilovetorezodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61756d8f-f81e-4c73-bcaf-8e693034ee00/zubugusipimuwilitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/740e9e7f-3660-46f9-a43e-471e1c229ba0/juwivoropidurajamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2cb03ba-3e8d-4391-915a-3b4c9671598b/13813248883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddff73e7-436d-49a9-8112-bbfa52cf6a8e/fojeziwaxajetikali.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_off0000ae19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE19 5664 bytes
SHA-256: 804259ebe33d5755c058d0ac4ceedaa6817530f805fae668df5b3407bb8fd3c5
font_01_sfnt_off0000c14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14F 10616 bytes
SHA-256: 4319134a6fd26b1616d1a3f609867669df3610a3c8bc15d64ebc00e7d4b78a7b

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