Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5dde8a5151303e8…

MALICIOUS

PDF

49.3 KB Created: 2020-08-07 04:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1acdebc0f40ba39d8062f4b498049077 SHA-1: fb20adfea61005d8dada2ed781c122d5029fb74d SHA-256: f5dde8a5151303e8b2c87aff8e42794dc16ac52b725b5c3d9ed9d024559c24ae
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a known malicious redirector, indicating a phishing or malware distribution attempt. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting an effort to obscure the final destination or distribute multiple malicious payloads. The document body, though corrupted, contains a URL that matches the malicious redirector, reinforcing the attack vector.

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.cc/pify?keyword=definicion+de+espacio+en+arquitectura+pdf In PDF document text
    • http://files.gassingamerica.com/uploads/1/3/1/4/131452958/vopixezixasuv-vexole-zamepu.pdfIn PDF document text
    • http://files.samenecogardens.com/uploads/1/3/0/8/130813778/rubirifob.pdfIn PDF document text
    • http://files.memoriesofvignacourt.com/uploads/1/3/1/0/131070938/gutunixejon-metatetujuwo-kewalavujetavap.pdfIn PDF document text
    • http://files.liatelbling.com/uploads/1/3/2/6/132681308/3367660.pdfIn PDF document text
    • 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://cdn.shopify.com/s/files/1/0434/7471/4784/files/32959953896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/82108305287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/1077697959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/how_to_download_video_from_pornhub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/35233009941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/masalin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/40760632732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/kabodape.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000730b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730B 5124 bytes
SHA-256: cfcab55c5feb2268e8afb92000fe75c9f5e064deae706e32a36bfc710ce6fe53
font_01_sfnt_off00008481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8481 11112 bytes
SHA-256: 97179a3e51d1bdc268da64ea3fe9cc4b144f7066bb219d00f2e70c576da7fd00
font_02_sfnt_off0000a8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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