Malicious PDF — malware analysis report

Static analysis result for SHA-256 acea2b356413ecf7…

MALICIOUS

PDF

46.0 KB Created: 2020-11-03 08:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 96cc27bc2d3307ef099fe2a365c1b669 SHA-1: c25db1b173ed1e9880cadb3faee1a1a048c3b528 SHA-256: acea2b356413ecf730c61b093a7ee7e8caa34dcf20813fcc37bbd88d3ee11b99
154 Risk Score

Malware Insights

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

The PDF contains a lure related to Discord profile pictures, but its primary function is to host a link farm. It redirects users to a malicious URL, ttraff.link, which is likely part of a phishing or scam campaign. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports the link farm heuristic.

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.link/123?keyword=how+to+get+someone+s+discord+profile+picture In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f892ab70333f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f9e52167227b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379605/normal_5f8ded5510db0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f90afb56de14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f96b8f7ab6af.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/bc44ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f8804c26cf96.pdfIn PDF document text
    • https://discord.comIn 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/71b4da0a-3573-4515-8f01-645a87f1b85c/nadanaruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b63138e-5fb1-4295-a006-6a6aa30698eb/how_to_crash_a_chromebook_on_purpose.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/maths_aptitude_test_questions_and_answers_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8e87b1-0234-4c04-b4ad-6565cfe1b85c/molabutuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ffecfd0-e475-4e19-8e41-0ca450d53de5/pedatumokaruvete.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/beps_action_plan_8.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E50 5320 bytes
SHA-256: 58e787b1ad7b7b98d410662e424b0c537de2cad828cd225e29622f21c00a04c2
font_01_sfnt_off0000706b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706B 10568 bytes
SHA-256: f51cb8434580df74a4877b3500bb9afef99aeb05f84187d662243935b5be5cb6
font_02_sfnt_off000094e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E0 16460 bytes
SHA-256: d975aad05103e6e5903d34981b043fb1fb57f4c56d562641d58fe6d22a3d0398

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