Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d9d24c09cacd86…

MALICIOUS

PDF

33.0 KB Created: 2020-08-10 11:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a973322421bd5b61958f00b66f211c8c SHA-1: 435bd72f3885d32425af8fd24dec9114c6ef6f99 SHA-256: 18d9d24c09cacd86a25896380257ad2742c75776c0d936fde8745e8a09f01637
194 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body text and embedded URLs suggest a lure for downloading content related to 'big data processing', likely a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-linked PDFs further supports a malicious intent to drive traffic to potentially harmful 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.com/pify?keyword=modern+big+data+processing+with+hadoop+pdf In PDF document text
    • http://files.houghtonrangersjuniors.co.uk/uploads/1/3/0/7/130775014/zidumaragizuf.pdfIn PDF document text
    • http://files.canberraplacentaservices.com/uploads/1/3/1/3/131384401/tufuwanu.pdfIn PDF document text
    • http://files.small2big.co.uk/uploads/1/3/0/7/130775520/3184520.pdfIn PDF document text
    • http://files.goodeatsbyjeff.com/uploads/1/3/1/3/131383333/sodasixubinawoleroda.pdfIn PDF document text
    • http://files.geralddesiralfinearts.com/uploads/1/3/0/7/130775753/goroludosiribanawas.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/1/0437/3826/7809/files/66509293180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/rutogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/31423368651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9376/1941/files/noun_verb_adjective_adverb_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/arduino_data_types.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/sufowabawapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/wizefaxixeriloditel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/acrobat_dc_cannot_edit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/thumbs_up_in_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4540/files/wujesanazo.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_off0000444e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x444E 5620 bytes
SHA-256: cb525cddca57759681313b0690cbe9aabf6150437aea0056549d4578889e3635
font_01_sfnt_off00005784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5784 9276 bytes
SHA-256: 04d64fec5385090629092a8956aab8cf9cd70ec979ed2c51bdc3dc4ca8e1da39

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