Malicious PDF — malware analysis report

Static analysis result for SHA-256 75270fcb87c32810…

MALICIOUS

PDF

48.4 KB Created: 2020-08-15 01:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af0349fcaae77886edc0820aa2f587e6 SHA-1: 546f2262303de168174b60a2077079bcf330a84a SHA-256: 75270fcb87c32810114f010b9c0d13eb5a721e37bf8cb8a5a44eb11b5f2e8d29
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=modelo+neoliberal+en+america+latina+pdf'. This suggests the document is designed to lead users to malicious infrastructure, likely as part of a phishing or scam campaign. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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=modelo+neoliberal+en+america+latina+pdf
    • http://files.charmayneadams.com/uploads/1/3/2/8/132813998/sebepiwopadip_minonowilesi_fuvub.pdf
    • http://files.bradleylloydteach.info/uploads/1/3/0/7/130739351/1308313.pdf
    • http://files.polarcenter-bg.com/uploads/1/3/1/4/131482915/8521ce2b.pdf
    • http://files.thecwch.org/uploads/1/3/1/8/131856430/mipasaza-rivebaxete-paxuloko-molowukit.pdf
    • http://niguwujin.joyofchristpress.com/uploads/1/3/1/1/131164211/zudugixideki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6449/0149/files/dofe_assessors_report_gold.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/os_atos_institucionais.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/muzadifadinef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/suniwidunenisigaxoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/zizumupolitulujuvepuzunam.pdf
    • https://cdn.shopify.com/s/files/1/0430/7589/5450/files/bat_bioacoustics.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/saturated_steam_pressure_table.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/sesawax.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/metal_forming_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0434/0600/0282/files/overstreet_comic_book_grading_guide.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_off00007b50.bin
b4bc74cdbfdb1cdd45a69ffabe1a64537919133d78afb3477085af6e886d8c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B50 5268 bytes
font_01_sfnt_off00008d28.bin
f3aa4e593f18a82f0559e57f8882be8ffbe80d8ca7cb5969fd33391832b1252a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D28 11600 bytes

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