Malicious PDF — malware analysis report

Static analysis result for SHA-256 1839735483e4e718…

MALICIOUS

PDF

46.9 KB Created: 2020-10-30 21:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fdbbbd7dc149594945917b3df988fba5 SHA-1: abf4105d79984c17ae79c33a0eec4b2378bbe549 SHA-256: 1839735483e4e7183c625fb21b9bcdfc2a705b05cf4f68ac7d1882ec7a1051b5
154 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically directing users to 'ttraff.club' under the guise of downloading Spotify Premium. This URL is flagged as a malicious redirector, indicating a phishing or malware distribution attempt. The presence of a large number of external PDF links suggests a link farm designed to manipulate search engine results or distribute malicious content.

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 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.
  • 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/123?keyword=download+spotify+premium+apk+free+ios In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f98a3b5140f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8f5b0517b11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f9c02284ffd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407747/normal_5f95a37ddf33f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f930559788a8.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/886630ef-63be-466a-9f18-45e14e853271/tu_jab_jab_mujhko_pukare_song_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2570/5378/files/peg_word_system_psychology_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b415cd81-1cc0-46c7-aa3d-87851ea91b2c/midsegment_of_a_triangle_kuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/163e5648-d4b5-4736-a451-11127bc632e5/17058097625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcbf3590-06ef-4e5b-9cec-7d5c25d638ac/19171946263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ecb4fa8-d584-4baf-a44c-1a4bc8ee881c/motezujatome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9879/1333/files/73793964807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc096bb7-55bb-47f3-90c8-f532f0233073/4614637459.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_off000077f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F4 5444 bytes
SHA-256: 18aa88b84d37d81f53118933ee373957e199c5404005531e4b914a32130d1182
font_01_sfnt_off00008a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A89 10576 bytes
SHA-256: 385f2904c6a63a3648327a6094dd87692a613630966e77816b7a8464c3efd29d

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