Malicious PDF — malware analysis report

Static analysis result for SHA-256 2492d2ac82b50fba…

MALICIOUS

PDF

790.8 KB Created: 2020-08-28 02:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f20e2596c6492f43f2349fc1344be83f SHA-1: b6c6fde53a4725df728f80b382fff6b4072d16e2 SHA-256: 2492d2ac82b50fba6446b164ddc35dc3a7598ad1bd7da91a27e58aa694398010
94 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a Brother Intellifax printer and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9326

Heuristics 3

  • 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.
  • 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=brother+%25C4%25B1ntellifax+770+Kullan%25C4%25B1m+K%25C4%25B1la In PDF document text
    • http://fetixilus.embodylifeyoga.com/uploads/1/3/0/9/130969690/b898176f5b8.pdfIn PDF document text
    • http://files.lawlorstudio.com/uploads/1/3/1/4/131437276/cd2229df475b6.pdfIn PDF document text
    • http://files.fetzerscake.com/uploads/1/3/1/4/131455636/dunoko-matotekametexat-kavawepe-mewiwo.pdfIn 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/1/0431/6689/2186/files/nene_ambani_telugu_naa_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/autocad_presentation_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/customer_acquisition_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/30727543098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/luzumor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2600/5406/files/73824169067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/94469174861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6486/0318/files/39060337261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/81265168188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/google_app_store_pc.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_off000bf37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF37F 5264 bytes
SHA-256: 75d55f65743fd3d3e4a394b5fbafc34d19ce51f1462c59f917faac61f89a8677
font_01_sfnt_off000c054d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC054D 23252 bytes
SHA-256: 580dea87de0f9f7dc1586ce9d1ac7a9e5bd321e0b2141986dd7797d0f1a68bd8

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