Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bfb74d28ed0b98f…

MALICIOUS

PDF

33.4 KB Created: 2020-10-04 03:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1afa147cdcf8fe265bd8952d89fb5bf SHA-1: 27f1cabc8d7fd951f5d3992faf92e6bb79803cb4 SHA-256: 7bfb74d28ed0b98f974de9946c5a270d784b2eb17e060eae23c7c68fb45c34b4
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary link pointing to a known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains references to the same malicious URL and other links, suggesting a lure to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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=sao+swordland+mp3+download In PDF document text
    • http://files.wonderpin.com/uploads/1/3/1/0/131069893/abd9dc.pdfIn PDF document text
    • http://files.kirkmahoe.com/uploads/1/3/1/4/131483719/8758137.pdfIn PDF document text
    • http://files.fromthelighthouse.org/uploads/1/3/2/6/132695472/682935.pdfIn PDF document text
    • http://files.compromiseof1790.com/uploads/1/3/1/3/131398591/lizumu-nakubibobij.pdfIn PDF document text
    • http://files.courtwatchma.org/uploads/1/3/1/3/131380930/fujijeka-vutoj.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/78403129934.pdfIn PDF document text
    • https://site-1040003.mozfiles.com/files/1040003/xiduzav.pdfIn PDF document text
    • https://site-1038531.mozfiles.com/files/1038531/76628239210.pdfIn PDF document text
    • https://site-1040785.mozfiles.com/files/1040785/kaxiverujezo.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/53364930778.pdfIn PDF document text
    • https://site-1041857.mozfiles.com/files/1041857/34122895978.pdfIn PDF document text
    • https://site-1038699.mozfiles.com/files/1038699/jometuxupeponafu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4418/4474/files/56539582556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1319/0044/files/piedmont_soaring_society.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_off000043fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43FE 5464 bytes
SHA-256: 05bc41cf6e035c1472a876938e1681e7480f48f04f5533b3465affcaddcbd1b5
font_01_sfnt_off00005689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5689 9992 bytes
SHA-256: a43630676b88ef1e1b3a7a0aa24aced3b548871507983c54866bd207996fe9cc

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