Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a4fc91e0d3d1f8…

MALICIOUS

PDF

44.7 KB Created: 2020-07-30 20:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84f2a890bc6c5d263d8bf3b74f1d3c3a SHA-1: 8fd426583bee7477491df62eb396cca76e749afa SHA-256: 89a4fc91e0d3d1f8d1ff93f5397cdcc0b4178e24fed2a23bf8b3fb8f922538f2
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are part of a link farm designed to improve search engine rankings. One prominent link redirects to a known malicious infrastructure, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create documents for SEO manipulation.

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.ru/pify?keyword=shading+techniques+worksheet+pdf In PDF document text
    • http://files.botanikaplants.com/uploads/1/3/1/4/131454766/ravawo.pdfIn PDF document text
    • http://files.shopgirlcookies.com/uploads/1/3/1/6/131606186/62d7b18dcea.pdfIn PDF document text
    • http://files.woodbinepubliclibrary.org/uploads/1/3/0/8/130814127/2f17f8f.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/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9328/7321/files/51931290759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/worazesubumofudijif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/95298300261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/leteje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5598/9404/files/vesozisome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4279/1839/files/98035543252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/dafoliwanipepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/56093611992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9527/7214/files/68130202654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2844/6358/files/kozefavali.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 3

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_off0000701f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701F 5652 bytes
SHA-256: 21f72b40e71c614f2cb7b2063fb8375eef951bc191a615617e1260015c9b030d
font_01_sfnt_off0000834e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834E 9968 bytes
SHA-256: 6031e25d29ececc47853158b2a4509bf922293f0a0e82b4429b630f595d4c30b

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