Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebb75184902d8ec…

MALICIOUS

PDF

42.8 KB Created: 2020-10-29 22:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6359fde187b726099d767de024d2a84 SHA-1: 1278114f5e29ce229429115f571ab562395e59e0 SHA-256: aebb75184902d8eca95bc62e7f8f1d092137f52f7d3b243e5e670c5afebdb3cc
154 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and a large number of external links, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The ML classifier strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links point towards a phishing or redirection attack.

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=walgreens+vaporizer+not+steaming
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/3a08eab74fbcd.pdf
    • https://cdn-cms.f-static.net/uploads/4408588/normal_5f9755704975c.pdf
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f894ac827798.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0496/5387/4844/files/modales_de_deduccion_en_ingles_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0498/4723/8811/files/voltage_in_series_and_parallel_circuits_worksheet.pdf
    • https://s3.amazonaws.com/jamokaroxoj/89403250382.pdf
    • https://uploads.strikinglycdn.com/files/2dbcb049-59c5-4f9b-8e50-5994f261ff1c/37117865379.pdf
    • https://s3.amazonaws.com/mawesenasijoser/lezejukowomur.pdf
    • https://uploads.strikinglycdn.com/files/4770d7df-aa5a-4255-9a02-20d8fdd50ca9/ruvoluzugowe.pdf
    • https://uploads.strikinglycdn.com/files/961f7b30-46ec-4e65-8a31-80d5a199627d/60262993376.pdf
    • https://cdn.shopify.com/s/files/1/0497/6256/6298/files/jet_promo_codes_2020_robux.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/5488024730.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/41920672974.pdf
    • https://s3.amazonaws.com/zobuwubedak/the_bold_italic_instagram.pdf
    • https://s3.amazonaws.com/fikuvine/96276229634.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006968.bin
c093d41b5f4b02f1f4dcc4770767e21279a622f514a74a2077476a7f1f7690cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6968 5260 bytes
font_01_sfnt_off00007b55.bin
3f3818f30dd7a6cc1e51221847d1c10c431d86e593ac8b152508753443372cf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B55 10196 bytes