Malicious PDF — malware analysis report

Static analysis result for SHA-256 594b93eec2108938…

MALICIOUS

PDF

34.0 KB Created: 2020-10-05 15:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b6ff7764070272883e00c33b36228a2 SHA-1: a0978126a9e7f3371d8bcc36a806a9a6038861fe SHA-256: 594b93eec210893807ba8a99989c10a19d84fba20eb5bed2f7686a8996ad3837
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm designed to host other PDFs. One prominent link directs to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a PDF download lure and the malicious URL itself.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=molecular+biology+principles+of+genome+function+2nd+edition+pdf+download In PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/lufonugo.pdfIn PDF document text
    • https://site-1040277.mozfiles.com/files/1040277/foravewopana.pdfIn PDF document text
    • https://site-1042884.mozfiles.com/files/1042884/zodofuximifofakuwavirop.pdfIn PDF document text
    • http://files.flashfoto.com.au/uploads/1/3/1/6/131637014/jupumajugol-kaguvo-sefosaj-vajabena.pdfIn PDF document text
    • http://files.crackodawnfarm.com/uploads/1/3/1/4/131408340/9676635.pdfIn PDF document text
    • http://mefase.chbcdunlap.com/uploads/1/3/1/8/131856819/ferupumipewo.pdfIn PDF document text
    • http://jezafirab.beachstreetboutiqueapparel.com/uploads/1/3/2/6/132695351/f231285a99f.pdfIn PDF document text
    • http://files.desainbangunan.com/uploads/1/3/1/3/131383297/107506.pdfIn PDF document text
    • http://tefol.victoriagrayphotography.com/uploads/1/3/1/4/131406950/jiwuva.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/a20548d7-14c4-42cc-9be6-f5d5501b76e3/kufazuzivowunixalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306c354d-7f98-4b79-9381-bcb9edb67d66/nifazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50c0c13-bb0f-4770-af2f-8e1dffc952db/bakukudoru.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45E9 5948 bytes
SHA-256: e1970cbadd654378921e3db7eba22fc2cddab0ededcb67adf69aa9d42187d5b2
font_01_sfnt_off00005a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A34 9588 bytes
SHA-256: 28848308b4df7a18136e014b5a111c522117e095ce45f926434ba08d68b3093e

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