Malicious PDF — malware analysis report

Static analysis result for SHA-256 3485d4acd57704ec…

MALICIOUS

PDF

79.5 KB Created: 2021-02-18 00:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1f4ce9f86638bc92d08c50a9aeb11141 SHA-1: a1155d215148b21f154cab40354f4a1faf92e0e3 SHA-256: 3485d4acd57704ec1dd9ebc42f17f646996873f00e85e0b7c9c123023e77a469
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to S3 buckets and CDNs, suggesting a link farm or redirection scheme. The primary redirector URL, 'https://jottigo.ru/strik?utm_term=multiple+streams+of+income+quotes', is flagged as a high-risk SEO redirector. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely used as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/strik?utm_term=multiple+streams+of+income+quotes PDF link annotation
    • https://cdn.sqhk.co/wutalididow/2jdSdjb/vifolefuvukezu.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/3ha5jjh/ravozutokona.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/aNhcQji/56454591387.pdfIn PDF document text
    • https://cdn.sqhk.co/guludagew/YjfmGia/nonazatumozagojosifatumok.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/gcibHjd/paycell_nedir_ne_icin_kullan_l_r.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/ZigjdCV/gunakoz.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/igigjdL/shark_world_evolution_apk.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/4536984.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://s3.amazonaws.com/batiku/xujux.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/oxford_dictionary_english_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/89787041306.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/sports_tv_2._0_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/jaxotigabufupufajowisa.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/47641616958.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/75566527691.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/phonics_worksheets_for_kindergarten_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/cisco_ws-_3850-_24t_ios.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB90 5176 bytes
SHA-256: 41a3006656f74c448843aa5ec2e4d98b972c330e8ca3ade7cc4768c209cd17ae
font_01_sfnt_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 11016 bytes
SHA-256: a2c5908c0c3ca6c457dab5bcb83e1698e82f74e2d12e6ce8f4ad0d47aceb37e4
font_02_sfnt_off0001229f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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