Malicious PDF — malware analysis report

Static analysis result for SHA-256 989fdb8226129ad1…

MALICIOUS

PDF

40.2 KB Created: 2020-11-04 09:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a361c46475e63ac32875e7ce97d46d53 SHA-1: 1952c6ece64afc94b4609a1494a80b3fc96357ea SHA-256: 989fdb8226129ad10b76e3fd1958b041e80d6780cb225d8b8a54bf0392179129
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, indicating an attempt to lead the user to harmful content. The ML classifier strongly flagged this PDF as malicious, and the structure suggests it's part of a link farm designed for SEO manipulation to attract clicks. The primary IOC is the malicious redirector URL.

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/aws?keyword=physical+and+chemical+properties+of+bases In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_5f9279ca47095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f893a15561b2.pdfIn PDF document text
    • https://gejimedetudumi.weebly.com/uploads/1/3/3/9/133997730/b7fcb6ff9eec197.pdfIn PDF document text
    • https://xodunutejoxefis.weebly.com/uploads/1/3/4/4/134476009/rexulov.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/fulekoxa-susupol.pdfIn PDF document text
    • https://tokunebejuz.weebly.com/uploads/1/3/4/3/134323577/puwigilivi-dujosijoroj.pdfIn PDF document text
    • https://vakasuvarepem.weebly.com/uploads/1/3/4/3/134328097/jizekeserore_fijulagekedaku.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/c167e7091.pdfIn PDF document text
    • https://xepajozojiv.weebly.com/uploads/1/3/4/4/134476610/metunubenigetus.pdfIn PDF document text
    • https://kifelulamexeb.weebly.com/uploads/1/3/4/3/134310841/a04877.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9fe1fd6-7d5e-422a-a879-7fb3824b9bc6/37586303914.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/87865328613.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/bukokoveperopizemonaletun.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/dakomusoxi.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_off00005e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 5640 bytes
SHA-256: 3758aa5e72d9f0252ad3cd9a8f0c2ae3e1ff9bfdfe92242e7c331f83144b97dd
font_01_sfnt_off0000716f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716F 10060 bytes
SHA-256: ab557a9e519995fec668c9500664a44d36bf15fb0233198d25a70a52a6bf6a46

Open this report in the interactive analyzer, or submit your own file for analysis.