Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f4d5d3d888ce48…

MALICIOUS

PDF

40.2 KB Created: 2020-10-28 08:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 584c36617c0509accd902d184adc532b SHA-1: d6ff8bf2e96837ef27fcecd321e8adb07ac6e020 SHA-256: e7f4d5d3d888ce481ff5dcd18c0ae56f0f3757eaf51ea056be71df7de3b21e05
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://gettraff.ru/strik?keyword=que+es+la+diferencia+entre+los+verbos+regulares+e+irregulares In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_5f8aee482f566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424692/normal_5f98ddf54e4d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f88a89abf47a.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/1/0502/8364/3065/files/internship_request_email_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3716/6230/files/munomuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2448/2982/files/gta_4_android_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df74036-2f51-4074-a98f-e9fcdd0ffe9c/radowifonagugewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884b395a-dbf2-49e6-887e-71d6ac5302cb/computational_thinking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0377/1547/files/nagogilagenosejejox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1411/7293/files/69460066688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5469/4039/files/40_fluid_ounces_to_3_cups.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/craigslist_orange_county_ny.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_off00005b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6C 5452 bytes
SHA-256: 87767edbd3c1e9adb0ec0191ad67912f94906299f6648b24259d908d098a1324
font_01_sfnt_off00006e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E06 10900 bytes
SHA-256: e2a24a74f4b7166fc86f5a23c9e4d2ef26aaf86f45863b1484422f439fa72865