Malicious PDF — malware analysis report

Static analysis result for SHA-256 847b2303e998190c…

MALICIOUS

PDF

71.8 KB Created: 2020-12-26 17:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7fa4354ded08787237b4cf4741c06ba6 SHA-1: 5c4e3fe6125fb30af03a0e2dcca84318cd4706e0 SHA-256: 847b2303e998190c654b5aabf854e5745032676fb87aa3e75983459dc7b31744
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links pointing to external PDF files hosted on various disposable domains. The heuristic firings indicate this is a link farm, likely for SEO manipulation or to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/aws?utm_term=air+force+y+group+old+paper+pdf In PDF document text
    • https://mogewojelepa.weebly.com/uploads/1/3/4/6/134681452/8844701.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/3753658.pdfIn PDF document text
    • https://jugidemavewug.weebly.com/uploads/1/3/4/2/134265355/devega-naxax-levemabusulimu-zodidebiwo.pdfIn PDF document text
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/02c7cc97d3b2a.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/9319058.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/4QiejcN/gutschein_amazon_kaufen_bei_rewe.pdfIn PDF document text
    • https://fesalepexixid.weebly.com/uploads/1/3/4/6/134660072/4678355.pdfIn PDF document text
    • https://gelasinez.weebly.com/uploads/1/3/4/7/134763890/625b7174731917.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/c73giil/sizapusiku.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/tusog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF07 5236 bytes
SHA-256: 24d60603662927a1561e3d3b0b08097efe59bc403985fb14d8112b2de88cd938
font_01_sfnt_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 9836 bytes
SHA-256: 16c5f1e93a4526b3547ac3b72fc6cced0366d9cee167a11deb2a26b3a9b5a5da

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