Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bb4fd0fa0f5d49…

MALICIOUS

PDF

47.3 KB Created: 2020-08-26 00:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67de9383b3979f8106be2ce66a8e8927 SHA-1: dd5c6ae7dec4a4d13e857daaec4071ddb0efee5d SHA-256: 82bb4fd0fa0f5d49e222d94116910713ea2e2162fa16934c9d88fca02dca5731
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, many of which point to redirector infrastructure designed to obscure the final malicious destination. The document body and heuristics indicate a lure for free downloads, likely a phishing or malware distribution attempt. The ML classifier strongly suggests maliciousness, and the presence of embedded URLs points towards a potential client-side exploit or script execution.

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.
  • 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.
  • 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://ttraff.link/pify?keyword=21+day+brain+detox+steps+pdf+free+do In PDF document text
    • http://favuga.buenasaludclub.org/uploads/1/3/2/7/132740873/d90e16.pdfIn PDF document text
    • http://jilin.stephaneheaume.com/uploads/1/3/1/8/131857101/nopawukixigojor.pdfIn PDF document text
    • http://gapofujuw.airbrushinggourds.com/uploads/1/3/0/8/130814328/931555.pdfIn PDF document text
    • http://files.ideaingramhills.com/uploads/1/3/1/0/131070820/73907.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/1/0432/1116/1768/files/86627424807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6929/3223/files/53386586383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/dabokupomujuvukab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/60459789074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/58512913126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/3_phase_automatic_voltage_regulator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5025/5014/files/lowes_bristol_va.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/xagifeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/dujubopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/classroom_language_flashcards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5819/9719/files/10172231962.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 4

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_off0000790b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790B 5404 bytes
SHA-256: 35191aa074388c1b285a94e06e4ec849bceebd6358fb51af5175ed198b5d6733
font_01_sfnt_off00008b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7F 10644 bytes
SHA-256: b4d869fb3eb90ba565c7927e80c81fb33ec274e38ccf719eb6e78860ec69457d

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