Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83171acf05353ac…

MALICIOUS

PDF

43.0 KB Created: 2020-09-30 05:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b31b11a1836f31caa65de91fd6996054 SHA-1: 857aa989d76accec1328f1599ad28228420ae001 SHA-256: c83171acf05353ac94eb467b707e46038fc2eb08118e9fac8d26ec2c86fa32aa
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL. This suggests a phishing attempt to trick users into downloading further malware or visiting a compromised site.

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/strik?keyword=amityville+horror+book+free+pdf In PDF document text
    • http://fivibiwe.2ndkitelife.com/uploads/1/3/1/6/131636698/2d19d962e3bd.pdfIn PDF document text
    • http://files.truthfulart.com/uploads/1/3/2/3/132303010/nunolixaximeliwem.pdfIn PDF document text
    • http://voruke.looprenovations.com.au/uploads/1/3/0/7/130739693/jepurafiso-bunev.pdfIn PDF document text
    • http://files.famusshp.com/uploads/1/3/1/8/131856306/1a8cad75.pdfIn PDF document text
    • http://files.mezfantasypublishing.com/uploads/1/3/1/8/131858661/fatumebiwokuv.pdfIn PDF document text
    • http://files.sarahivill.com/uploads/1/3/1/4/131410012/mapemagada.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/32984fa2-7dbc-4b95-b73f-ff74443255c8/14894479131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa10857-f2a1-4ffc-8828-a10846d8e351/21560627191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5202f53-7cdf-4c64-aac1-8cd836b579a8/76837475416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae6a8a1-f65d-480a-a78f-8c0c08657a2b/wojujisobuzusakitejixuzim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6231/files/39295451023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/finupaja.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_off00006a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A84 5248 bytes
SHA-256: 3a4fe3ed6dea2dd551f03e0b05fbd5adae70550abcceeda93a929fddc7248833
font_01_sfnt_off00007c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C40 10320 bytes
SHA-256: 8775b9d989ae1ef17eb2ad69f99916c2411e41a83ddadba917404a1daaf08084