Malicious PDF — malware analysis report

Static analysis result for SHA-256 888e5ce9af3858d4…

MALICIOUS

PDF

31.7 KB Created: 2020-08-06 05:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 657835cd9baf3dccb4a5d3ecf1e92461 SHA-1: 54035adc473cd77ebd350d9d685cd9b499503fec SHA-256: 888e5ce9af3858d47e4f44a281a0f2a7b78ef0d0f0eb95808a3e94e5be09faf1
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service that is known to host malicious content. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=strength+of+materials+solved+problems+pdf, which is also flagged by heuristics as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to trick users into downloading malware or visiting 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.
  • 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=strength+of+materials+solved+problems+pdf In PDF document text
    • http://files.artflockstudio.com/uploads/1/3/1/4/131455832/7ad4613eaf.pdfIn PDF document text
    • http://novake.campverdecommunitychurch.org/uploads/1/3/1/4/131454549/f934e4.pdfIn PDF document text
    • http://files.dianeetatumwriter.com/uploads/1/3/1/3/131380728/lusuniveguguzixo.pdfIn PDF document text
    • http://files.maggiewatkinsdoula.com/uploads/1/3/0/8/130813991/376082.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/1/0435/7577/1304/files/29667124547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/julubado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/87262234600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/muloxexufatabupuvojuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/70532102850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/38444968656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/26482239798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/70449012634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0132/3421/files/muxugigolilinol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/57446007398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/guerra_del_canal_de_suez.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_off00004198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4198 5760 bytes
SHA-256: 68bd512543af26fbecb2274d98ccbea81dc910fe2ea7f15fb7616d77b0640ed0
font_01_sfnt_off0000550a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x550A 8596 bytes
SHA-256: f10021b3348b599badfe306039ad0a5d4719e2bab5881b9ed9f50f870c9a2d70

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