Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a1b859416145f0…

MALICIOUS

PDF

46.6 KB Created: 2020-10-11 05:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 52599727761af6f290134840fe82cb84 SHA-1: a89a3d4e1bbc86ef4e08efd2b403e559fcdc80d0 SHA-256: 70a1b859416145f0487cabdeedcd4a1b827b80da7fd6a08e3e3204fd28b04e21
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=people-oriented+and+action-oriented+are+examples+of In PDF document text
    • https://site-1043257.mozfiles.com/files/1043257/85896949297.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/10900490170.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/50992539472.pdfIn PDF document text
    • http://files.parisazivari.com/uploads/1/3/0/7/130776790/dce9e.pdfIn PDF document text
    • http://files.commrecoverycc.org/uploads/1/3/0/9/130968915/damusinefirizus.pdfIn PDF document text
    • http://kijojulij.awesomepawsacademy.com/uploads/1/3/1/4/131407945/339086.pdfIn PDF document text
    • https://site-1038312.mozfiles.com/files/1038312/vujoj.pdfIn PDF document text
    • https://site-1044053.mozfiles.com/files/1044053/jizetiveviwelokezujewuta.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/1/0437/4095/4773/files/ms_word_practical_exercises_for_college_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/gmat_dates_2015-2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2515/3430/files/13356207886.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_off000077d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D8 5400 bytes
SHA-256: 4c0e757354c44bf8937d84a6afca9d1731da51a79cf67ac2408184ee3462612b
font_01_sfnt_off00008a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1F 10260 bytes
SHA-256: 854ad63a3891379930ac9b3a94c42ac68a62bce678af892640a8295d5696a0c2