Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2ec50f37dc72d1…

MALICIOUS

PDF

36.7 KB Created: 2020-08-14 06:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edeb8e2cb2b562d2656a1ccf9e998fbc SHA-1: 7ee8b64bcb227437d4adac26ada89636eb8106a9 SHA-256: eb2ec50f37dc72d1d326c3aafdcb6921c8e1a8aab1b75bef82fae049fc6c5ec6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to potentially malicious redirectors. The document body contains text related to 'Begin Again movie sheet music' and includes the malicious URL, suggesting a lure to disguise the malicious intent. The presence of numerous external links, including a link farm heuristic, indicates a strong likelihood of redirecting users to 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.ru/pify?keyword=begin+again+movie+sheet+music
    • http://denaz.haptotherapiekoningsweg.nl/uploads/1/3/1/8/131857243/fosamewa.pdf
    • http://files.roboticsforall.net/uploads/1/3/1/3/131397973/94f29df04e11e.pdf
    • http://kokuzo.ensomama.com/uploads/1/3/1/1/131163635/b9603775.pdf
    • http://files.integrativemassageworks.com/uploads/1/3/1/3/131380847/jopudekaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4550/3655/files/11087425005.pdf
    • https://cdn.shopify.com/s/files/1/0432/7967/9656/files/76355500623.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/62245667891.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0328/files/catalogo_cedulas_do_brasil_download_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1788/files/zoff_adhesive_remover_wipes_safety_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/behaviorism_notes.pdf
    • https://cdn.shopify.com/s/files/1/0441/0641/6280/files/hitchhiker_s_guide_42_question.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/benchmark_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/95943361975.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nawujumukupuzuwoxelojoses.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f62.bin
15ce3714b94d241722006e50cc7416756eed833e0d9c8eda621bfb38718554d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F62 5192 bytes
font_01_sfnt_off000060f7.bin
14d193b8d8861b34a759be1b9ca1ef747be0fa359b39c5048aecdf3e7d5c8b87
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F7 10412 bytes