Malicious PDF — malware analysis report

Static analysis result for SHA-256 2750adfa3064e654…

MALICIOUS

PDF

44.0 KB Created: 2020-09-09 20:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d6ec6de4959f68181209c2f0a12e7f9a SHA-1: 6c5e79240a696d5af76b329fca975cc8fe232a60 SHA-256: 2750adfa3064e654579372ef120b3b6b86a19a73de348f068245ef1b468d32b4
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.link/pify?keyword=long+division+worksheets+grade+5+free In PDF document text
    • http://files.francoiskabore.com/uploads/1/3/1/6/131606815/zikazubasutupi.pdfIn PDF document text
    • http://buvexole.hometechrenovations.ca/uploads/1/3/0/8/130874426/vidaposaxip-lobuvor-tasatak.pdfIn PDF document text
    • http://sarosoxid.hannahpurdyfoggin.com/uploads/1/3/1/4/131437699/pemukutuvuvaru-latuxito.pdfIn PDF document text
    • http://files.visitgather.com/uploads/1/3/0/7/130739028/3042516.pdfIn PDF document text
    • http://kaxonoro.francais.brainintegration.net/uploads/1/3/0/7/130739163/gobin.pdfIn PDF document text
    • http://files.feedmeupdelivery.com/uploads/1/3/1/8/131871633/18b79fd068651b2.pdfIn PDF document text
    • http://files.georgiavinegar.com/uploads/1/3/0/7/130739678/xazuxomowiv_mokiki_famoginereli_kivapuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/05e3ad_fb5964e3127448338f93e16422fab161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9557/3158/files/nugajagosetifelaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9548/1754/files/platformio_specify_upload_port.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3866/9976/files/vuzudosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0400/2210/files/29982458101.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_off00006cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB1 5416 bytes
SHA-256: e60ed728d5b78a1f7d2bc4d0b3617dd72a3c0b3fd14f0a7f9d665f8621bc194e
font_01_sfnt_off00007f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3C 10456 bytes
SHA-256: 93a9430fa4cdf7d40a592677f79aaa06d5589f3b59f3ed73e6f6f6c5dd42b899