Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78a3543a6487682…

MALICIOUS

PDF

47.4 KB Created: 2020-10-12 11:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 049c9790e86d3ca94b21414e0ba400df SHA-1: 28386b9c1eae0014ffa1ee111604cf30e7f9a6d7 SHA-256: a78a3543a648768251b3186d9ee40aac8de46bd727c69f86e47566b090645495
124 Risk Score

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 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://gettraff.ru/strik?keyword=dual+app+di+android+one In PDF document text
    • https://site-1040262.mozfiles.com/files/1040262/4656968441.pdfIn PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/54882248930.pdfIn PDF document text
    • https://site-1042554.mozfiles.com/files/1042554/pijikideninipezo.pdfIn PDF document text
    • https://site-1041173.mozfiles.com/files/1041173/39938389300.pdfIn PDF document text
    • https://site-1039828.mozfiles.com/files/1039828/vulibapanunelefesivezo.pdfIn PDF document text
    • http://files.martinshoalsbaseball.com/uploads/1/3/0/7/130776673/a46b91.pdfIn PDF document text
    • http://files.armenianchurchofaustin.net/uploads/1/3/1/4/131438567/4212295.pdfIn PDF document text
    • http://files.ellendonaldson.com/uploads/1/3/1/4/131452958/a71fc710da19.pdfIn PDF document text
    • http://xuvuje.pricklypotatohedgehogs.com/uploads/1/3/0/8/130873995/0c3591901376.pdfIn PDF document text
    • https://site-1043375.mozfiles.com/files/1043375/49967779819.pdfIn PDF document text
    • https://site-1043613.mozfiles.com/files/1043613/31388392744.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/bifakivuwetori.pdfIn PDF document text
    • https://site-1042590.mozfiles.com/files/1042590/ketax.pdfIn PDF document text
    • https://site-1037899.mozfiles.com/files/1037899/talilojekulobarare.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2042/6653/files/lomit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/laxijer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5023/7604/files/30265407872.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE2 4576 bytes
SHA-256: b1515c06c7baf88bdba1605bf84af3fa7656e899f3791c89e575825a0b1778d7
font_01_sfnt_off00007e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E68 10544 bytes
SHA-256: 434334693a5961ae17c7c3ee01f5c00f7731c7a3752342b6fe64bc0902e41eef
font_02_sfnt_off0000a275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA275 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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