Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadf34f365cbc6ed…

MALICIOUS

PDF

39.0 KB Created: 2020-08-01 23:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 765825a8c5f91132a95a625d85256f04 SHA-1: b98aa8efcd7a4cfffc5f00bfd65cf68d637d3066 SHA-256: cadf34f365cbc6ed4bb4f2319f18ab45cc80dc43685ba9e55a44f4402990858a
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are embedded within the document body and disguised as educational content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=elementary+differential+equations+6th+edition+pdf'. This suggests the document's primary purpose is to lure users into clicking malicious links, likely leading to further malware downloads or phishing attempts.

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=elementary+differential+equations+6th+edition+pdf In PDF document text
    • http://files.kpuhra.com/uploads/1/3/0/7/130775853/reretipowogatus.pdfIn PDF document text
    • http://files.harrysinkpot.co.uk/uploads/1/3/1/3/131382497/rolaraxekewis.pdfIn PDF document text
    • http://files.shopthornburyfromagerie.com/uploads/1/3/2/7/132740462/zaluzodipu_kokeseweduxugar_wogawisav_pitagi.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/1/0431/4395/4594/files/pitamuwux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/26003394807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9818/3582/files/59848660425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/nikufowoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/22886975220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/79113881071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/nusoxetegiwuzixax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98690712505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/linufuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8115/2152/files/nutuxupeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/fuxisax.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 7

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_off00004c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2E 5500 bytes
SHA-256: 3d4ee98fee42d986866d4c3b31d7c6b7b1bcab24c5ea62122468063090146a51
font_01_sfnt_off00005ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBC 9936 bytes
SHA-256: d872861e11d07d165b1d86f77dcca57dde7239e24d83ce68702ec6e29199711b
font_02_sfnt_off0000808c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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