Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1a24820ef60cf2…

MALICIOUS

PDF

41.9 KB Created: 2020-10-08 12:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-09
MD5: ba4024ab8558804d6b83eb2741401e0c SHA-1: 34f86e732ef3c05d6c380db72cdfc87edd661f68 SHA-256: 5e1a24820ef60cf29015f87704fe5e6c37a167842107f767c153bf0667c4e3d3
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its function as a link farm, containing numerous embedded URLs that lead to other PDF documents. One of these URLs, https://gettraff.ru/strik?keyword=hombres+de+maiz+libro+completo+pdf, is flagged as a malicious redirector. The document body contains text related to a book, likely a lure to encourage clicks on the embedded links. No scripts were extracted, but the overall structure suggests an attempt to distribute malicious content or lead users to malicious sites.

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://gettraff.ru/strik?keyword=hombres+de+maiz+libro+completo+pdf In PDF document text
    • http://files.keppelcoastcameraclub.com/uploads/1/3/0/7/130776250/8235018.pdfIn PDF document text
    • http://files.alittletong.com/uploads/1/3/1/3/131379039/9370412.pdfIn PDF document text
    • http://files.marketingbycat.com/uploads/1/3/1/3/131384778/pupebebukutalupus.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/49692374943.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/xusogarofewax.pdfIn PDF document text
    • https://site-1040610.mozfiles.com/files/1040610/58550494917.pdfIn PDF document text
    • http://files.studiokd.ca/uploads/1/3/1/4/131482823/ffc9f9fadfc.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000635d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000635d.bin)
    • https://uploads.strikinglycdn.com/files/2887b3a0-5eaa-4d23-996e-790af6c60ab6/pifalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67d1bad-9822-49dd-ad22-d8a28a055c70/dubife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70236c00-b586-4ac0-adb5-d55faa867730/jexonaminovexomikav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe78b916-22f4-462d-bab0-a2109295348c/38326466327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44e187e-c3ea-4760-8fff-c4f98f158ae4/32570649378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d547fa-02b2-42ca-9cd2-f453ce69d928/3222429036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65152ed2-ba34-458c-aa8d-81951aec4505/poxirivuvajagodinewatav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe367aa4-919b-4eee-b513-9d9c89060844/rinesofimuwikuwepikibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626081ae-caaf-4874-9a9c-83c6e47a4967/witokepibipexekikit.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 extracted file (font_00_sfnt_off0000635d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635D 5452 bytes
SHA-256: 65b07e2cc0bcaf8389b892b36c72d86dcaa3a4fb4a7871839471b30333400336
font_01_sfnt_off000075cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CC 10952 bytes
SHA-256: 74217f70c36eef4a204f9a69ebdd407be17d4066aad7ede1aeed8d7f69cbd3b2