Malicious PDF — malware analysis report

Static analysis result for SHA-256 105cf1485762b0fe…

MALICIOUS

PDF

75.9 KB Created: 2020-12-18 00:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5a3e3be7c57a350d81ea49b82dd1e6b9 SHA-1: 153a52e46f4325b464485eb809612d33ea4a41f9 SHA-256: 105cf1485762b0feb88db9e617b26aaba2afde91e91da095e5dbee6dbd3adae1
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure referencing a 'Terraria ultimate moon lord guide' and includes a high-severity heuristic firing for an SEO redirector link. This link, 'https://trafffe.ru/strik?utm_term=terraria+ultimate+moon+lord+guide', is identified as the primary IOC. The document's structure and the presence of embedded URIs suggest an attempt to direct users to a malicious website, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://trafffe.ru/strik?utm_term=terraria+ultimate+moon+lord+guide PDF link annotation
    • 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/zasepo/judge_maceroni_macomb_county_circuit_court.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/setonokugisudi.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/vabinufipunokimemav.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/worakunozogunub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b921cf5-ed9e-43d0-a0b1-94b8b753fdcd/zimomasugosejavopemusi.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/90836015722.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64899f9866f3fd2f86f4e/t/5fc9d1a26a94db17e4920585/1607061923511/98795138199.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcde9cc0ee49e251fe4a4dc/t/5fd72dba313c42342ba6fded/1607937467249/bsc_nursing_3rd_year_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d6693d-5cef-41c7-834c-a4b81c3eeb73/76254872328.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/qasida_burda_sharif_arabic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4cc880-8eb8-44de-a988-3adf4e5b247c/42837948244.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0028ac14dfd36feec75cc/t/5fc189b908845d0924c4d247/1606519226576/jo_ha_kyu_iaido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd07829e-ef11-4df2-a29e-0789b405ad20/piluwewiwegogija.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/20374356002.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02D 4796 bytes
SHA-256: be43bc77cdff8db1e2d5d460c5a375eba8e71bc15b81e422741703e09c0d7f64
font_01_sfnt_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 10524 bytes
SHA-256: 5546a99fa44edaa61ae913b989ff8855587094353149a90d46a31c80b254283e
font_02_sfnt_off00011428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11428 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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