Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7270cc380f9bc34…

MALICIOUS

PDF

47.7 KB Created: 2020-10-29 06:16:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ac0ceee09bb05a17f8e3682cc39a64da SHA-1: 78376de0f953de1467ad2cb772199de9491dc7fa SHA-256: e7270cc380f9bc346fb282f5bf40b68c42aae312c3e34ad23ac0074b2ce488a3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://ttraff.com/pify?keyword=otis+search+michigan+department+corrections, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to direct users to malicious infrastructure.

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.com/pify?keyword=otis+search+michigan+department+corrections In PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/mefuxemopizeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5f91740fe0ea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_5f8d3f1a1e9e1.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/tewepiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5f8dc41c2a749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f877a5a48baa.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/1/0433/3876/0342/files/nicotine_patch_long_term_side_effects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6926/3003/files/seqrite_utm_firewall_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/fancy_pants_2_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/31620092060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aecdd1df-bd91-4cf6-9010-0cf83219cde7/lainitas_mexico_ejercicios_complemen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07f47da-16f1-4159-816a-85cf6eb1b373/29853162688.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/certificado_de_nacimiento_puerto_rico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9356/6634/files/87194348433.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/dragons_rise_of_berk_cheats_2020.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_off00007d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D28 5480 bytes
SHA-256: 7598bb341af3b75836c72c1962dab413cb5c8809b574ed1b05f6eb97c08d0bc4
font_01_sfnt_off00008fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA1 9932 bytes
SHA-256: 3eb670e76fdea9864f73a27b722d3a3baa02766b3bd5e84c10aea81cccca22ba

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