Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4f11b49578670c…

MALICIOUS

PDF

33.1 KB Created: 2020-09-18 23:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3395261d8067abdc1e006dcab6b73734 SHA-1: 6e3e2878716dadbdbb9b3d44ee4ebb2b85a18705 SHA-256: 2b4f11b49578670c88e8f610546bc07a43ffc99681f79d5217f72c5504eaa4f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded URLs, including a link to a known malicious redirector (https://ttraff.link/wix?keyword=markov+chain+period+calculator). The presence of a mass external PDF link farm further suggests a malicious intent to direct users to potentially harmful content. No scripts were extracted from this sample.

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/wix?keyword=markov+chain+period+calculator In PDF document text
    • http://files.vsbc-news.com/uploads/1/3/2/3/132303374/kigora_najuluze_zefezalefiwob_janunimamoxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a783a86-48b5-4f16-899d-2ed7c4b94b1d.filesusr.com/ugd/97aff7_f0b8c21672244995965775e41702e78e.pdf?index=trueIn PDF document text
    • https://48df6ef7-eafe-406a-b929-2e911876746e.filesusr.com/ugd/ef0078_a84f6845e3ae47feb662f7ae46533775.pdf?index=trueIn PDF document text
    • https://fc56efd5-9f01-41ea-9c90-f8b5fa15dcd8.filesusr.com/ugd/9734e7_7fb88053e0d34231aa807a29858f1b6e.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/9943971267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/occupational_safety_and_health_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9333/5970/files/lonafamurajixodifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/kapupurepazexinomobawoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/xepopikafesowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8774/1599/files/50665001224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3027/3434/files/elastic_band_gun_template.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 1

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_off0000437b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x437B 5112 bytes
SHA-256: 9c1918c0c747b759cf23e35673f80f53c42d888f65bce3bdac451c9179717e56
font_01_sfnt_off000054ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54EC 10192 bytes
SHA-256: 7f8bdcd0f3283afa0a4f9d9ce8f7b52ef8ea95c5abfc955c0b82170c837a3f03

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