Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de2aa3083d7341b…

MALICIOUS

PDF

45.8 KB Created: 2020-10-03 12:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8dfeb25aa9a2d8403633f327c8a6aff SHA-1: 266ec839e183d0f50402f8c3873027fc8768a114 SHA-256: 4de2aa3083d7341b827afffdb809746560f389c2e03e498a8a9c5e874f84d313
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to direct users to a harmful site, likely for phishing or malware delivery.

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://ggtraff.ru/pify?keyword=yoshi+meme+song+download In PDF document text
    • http://pajefo.nowwwriters.ca/uploads/1/3/0/7/130739278/lofovoraza.pdfIn PDF document text
    • http://gefaseti.christschampionsministries.org/uploads/1/3/1/3/131379326/venezokale.pdfIn PDF document text
    • http://files.swimbridgepreschool.com/uploads/1/3/1/3/131378816/lojofase_zevoge_lagiwexode.pdfIn 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/08f2ffad-d8a7-4bd0-a6e9-68e5c139086a/nomejas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d831652-9a38-4f68-b265-7e069730576e/47473321875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d88266f-0c97-4c83-96b9-f57501132152/jejufuligujinotew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/serta_air_lumbar_manager_chair_49987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4706/7041/files/50016021249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8290d1b-916f-4101-82ca-af6e5523c00c/11948553989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d46122-49d9-4ff8-8940-fbe4e6a92b11/melaragulafunuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba274281-8bc6-4fdd-b944-c8b9309565ff/nepagujozefomunodun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220f3385-ddf4-478b-b2e6-8b7247e52554/86763491687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f6426e4-eed4-44be-8c40-18a419aba09c/fumimixugebu.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_off000075ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EA 5196 bytes
SHA-256: ee7d90127bc1341a54addf928db33f6b1c87533688f8a8b0a438b91f94355d29
font_01_sfnt_off00008786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 10156 bytes
SHA-256: 0f1e329984e8fad5753c8494609f403bb991e904c043538a9cf057e0a647c493

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