Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ebddaa2ad96e6a…

MALICIOUS

PDF

49.4 KB Created: 2020-11-04 15:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 517c8a94c4fc714cda946c9462af6e3d SHA-1: 1702462a4ba0e576cec040bcfaea01047d0e424e SHA-256: 85ebddaa2ad96e6af3fdb2722ba4abceb5ee8f65ee4e73f129ab83f272c33738
124 Risk Score

Malware Insights

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

The PDF contains a link disguised as tournament information, which redirects to a known malicious URL. The ML classifier strongly indicated maliciousness, and the document structure suggests it's part of a link farm designed to drive traffic to potentially harmful sites. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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/123?keyword=iowa+high+school+wrestling+tournament+2020 In PDF document text
    • https://kevugekakizuxo.weebly.com/uploads/1/3/4/4/134481001/5a91eb45427.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/dowixipadutume.pdfIn PDF document text
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/xapixedixi.pdfIn PDF document text
    • https://tetekejitinile.weebly.com/uploads/1/3/4/5/134584465/ragikop.pdfIn PDF document text
    • https://lokenomosotim.weebly.com/uploads/1/3/4/4/134499182/waten-xoseno.pdfIn PDF document text
    • https://guzozexuvuro.weebly.com/uploads/1/3/4/3/134322735/vuvalazonulidatamimu.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/1/0478/0113/9359/files/fuxojenalafuf.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/vetenitufamavutuxadawalig.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/firajonelit.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/99439314578.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/katujimux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/4459/8457/files/xs_power_d3100_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/allah_names_with_urdu_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/rent_house_application.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_off0000811e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811E 5516 bytes
SHA-256: 6e0d87849a8903257ec1660f80a699be4b91306824e07bb51271ac5cddb39389
font_01_sfnt_off000093cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CD 10912 bytes
SHA-256: d6099b26eecac989c63c09077c8cd2bbbf72f34ca1c6e6b2ca1744f6d4605662

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