Malicious PDF — malware analysis report

Static analysis result for SHA-256 928f4b19b74774f8…

MALICIOUS

PDF

46.5 KB Created: 2020-11-04 10:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9a0e13cd801a5289dd317326cb2c930c SHA-1: 137a06207d12c0eea2f09e7e338508569b56425c SHA-256: 928f4b19b74774f817f1faeeb9e43fc6bb46cab4b92cd72d641a3c50fea7be09
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://cctraff.ru/aws?keyword=free+2020+tax+calculator+estimate. The document's structure and embedded links suggest a phishing or scam attempt, likely using a lure related to tax calculations. The presence of numerous external links, many pointing to Strikingly CDN, indicates a coordinated effort to 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://cctraff.ru/aws?keyword=free+2020+tax+calculator+estimate In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f964de4c8e68.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/lesep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c7bf30e1-5259-4886-893d-3090b31f4001/63507466148.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/dd_3.5_sorcerer_bonus_spells_per_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0274b099-64ce-4b08-a18f-73101565e2f8/calcul_rpartition_des_charges_par_essieu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f3f51b-d73d-42be-b841-dcffd2fbc83f/48533555704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372ec709-da43-4633-82f0-9c7d10fae4b2/mathematics_with_applications_11th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da958433-2ab7-4f32-ae0f-12f8b94fa444/kipam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a904e7b-b144-4ed4-99ed-efc700adf36f/skeletal_system_crossword_puzzle_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d365e1fe-de1f-4a1c-9599-53afb4a601e0/parent_teachers_association_vision_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b91a4f-dc4a-4016-b5ab-b50cba01fa3c/movie_gift_basket_amazon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000693a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693A 5016 bytes
SHA-256: 67498d7df19664e91a82107f264f0dfe46cb0bacbedc885a32316766c577f413
font_01_sfnt_off00007a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4D 10892 bytes
SHA-256: 77b82daf3f1e3b1806f0aedd75c2f011f1ac43ed2dc7a16d4f2217855704874c
font_02_sfnt_off00009f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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