Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5b3bb268713be8…

MALICIOUS

PDF

47.9 KB Created: 2020-10-25 15:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 309473d1ceff47559ed6cf26c1414696 SHA-1: 99cf72440d406b6526db834fe5839508573c7111 SHA-256: 4a5b3bb268713be8345b1cb6071bdb3b6df09a30b2ef3d7e3c1addf3c4180dc5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document title, designed to lure users into clicking it. The heuristic firings indicate this PDF is part of a link farm, likely for SEO poisoning or distributing malicious content. The embedded URLs, particularly the one pointing to ttraff.link, are flagged as malicious redirectors, suggesting the primary goal is to redirect the user to a harmful site. No scripts were extracted from this sample.

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=electromagnetisme+dans+le+vide+exercice+corrige+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/fafivegur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/hill_climb_racing_2_unblocked_66.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5844/3941/files/91771240193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7114/1575/files/duplicate_file_remover_paid_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/50178691203.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/zamuninawidubejalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f81959-1aef-4e43-bdc5-f0f3ada09b0f/83225084779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/270eccad-5976-4e8d-a0ca-a34153a42e04/robisuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b45368d-966c-46b3-85b5-0d7096bc7e7f/jizevazidadapuresukoruno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ad53e2-4ba4-47ed-b9b1-ddd5d1d66cd8/the_absolutely_true_diary_of_a_part-time_indian_study_guide_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/enterprise_security_risk_management.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/47664299702.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/warumer.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/rilopalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5393/8366/files/femavimigumamalawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5964/1025/files/pojeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9957/3410/files/44183942450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932c0db4-3f13-4dda-8efa-4304fd7e460d/jimozilubig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357da78a-332d-4a4c-8fb6-1f85ff51cffa/vifobupuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee25fa6-b31c-4119-a72a-5a136a1227ed/course_de_dure_cycle_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ba01e7-00ac-436f-9585-fb0037e69193/99402198106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2251aa1d-1f3d-4326-9f21-ed7d7747b456/vitotupumesa.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_off0000798f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798F 5560 bytes
SHA-256: 9df4dd593c41d53220c0a05a5e70a38a5cdbd8f4650cee80f1c3b79a6aaf4dac
font_01_sfnt_off00008c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6D 11940 bytes
SHA-256: dfb347366e3c46683d7e57fbf72662fb7b6de4ec6634ca0c64fd9bbdb6f4a7c3

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