Malicious PDF — malware analysis report

Static analysis result for SHA-256 75549cd66834e4ce…

MALICIOUS

PDF

43.8 KB Created: 2020-08-10 00:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02fdb79b2e8e16efb5e7f470002e86cf SHA-1: 49c041e5417f35e15b51be9d2dace5139287d4ee SHA-256: 75549cd66834e4ceee4a4bc85e2f7e85c6685910908c3ff4a072719d3a21c29d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to SEO-optimized URLs designed to appear as legitimate downloads. One prominent link, 'https://ttraff.cc/pify?keyword=physiology+of+hearing+and+balance+pdf', is identified as a malicious redirector. This suggests the PDF is part of a campaign to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious verdict.

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=physiology+of+hearing+and+balance+pdf In PDF document text
    • http://files.kwbcdeaf.com/uploads/1/3/0/7/130739987/wowajuxebaza_zorepukakar_rejebunevedif.pdfIn PDF document text
    • http://files.stmatthewspokane.org/uploads/1/3/1/8/131857199/df8a314ccfcf8.pdfIn PDF document text
    • http://puvofi.tlswindsled.com/uploads/1/3/1/6/131606490/besivusaribar.pdfIn PDF document text
    • http://files.quieteroahu.com/uploads/1/3/2/6/132681476/6646347.pdfIn PDF document text
    • http://files.nhwinterseniorsoftball.org/uploads/1/3/1/4/131414134/2420270.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/1/0434/4286/4289/files/87322610750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/dalipifosedixatijimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5555/4470/files/poweredge_r740_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/nigovumusaxarudisoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7160/1817/files/46592249955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6677/8009/files/risk_management_process_in_insurance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/86697219086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/actual_reading_ielts_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49221060197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/210599405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/airborne_disease_adalah.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 5660 bytes
SHA-256: 9f9bd8232c102461a1073dced6645e7c902b068e1399ddca17840faf3df18a4c
font_01_sfnt_off000079c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C7 12124 bytes
SHA-256: f814f80db3a1dc072dcca390d2a61a5cacfdc2e531b145eb25eda376b22f0b31

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