Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c06439dbcb1e4c3…

MALICIOUS

PDF

38.9 KB Created: 2020-08-25 20:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a38ff443d1eee9e163f78ef5cd14867 SHA-1: 57817772c0ce42f196e37454dfbff6126e21edd1 SHA-256: 4c06439dbcb1e4c3e3a0c6787324a618a28d58ea6094381d33d6000127cd2b55
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm and a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=ingenious+mechanisms+for+designers+and+inventors+volume+4, is designed to lure users into clicking by appearing to offer a technical document. This redirector likely leads to a malicious payload download or a phishing page. The presence of numerous other PDF links suggests a link-farming or SEO poisoning tactic to increase visibility and traffic to malicious 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=ingenious+mechanisms+for+designers+and+inventors+volume+4 In PDF document text
    • http://files.kitchen-519.com/uploads/1/3/1/4/131438692/2942167.pdfIn PDF document text
    • http://nuvefa.bouttechristian.org/uploads/1/3/1/3/131383791/ae432f.pdfIn PDF document text
    • http://files.cafedatalkalamode.com/uploads/1/3/1/4/131483550/3bbbf7.pdfIn PDF document text
    • http://files.cantonohiolandscaping.com/uploads/1/3/1/4/131453651/453c43f3.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/1/0436/6077/1481/files/catia_v5_sheet_metal_tutorial_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7322/3321/files/37419879206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4275/8053/files/wifaweribow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/17414156990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/68071770065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/94635388445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/21814083571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/cambridge_pet_tests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/4422/6460/files/audiomack_free_music_er.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/essential_thrombocytosis.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_off00005a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A01 5520 bytes
SHA-256: d7bcee66d321d1d1793e5c967e6a9d2d6efdb6e770b1dc9b42590e6dd56b93d5
font_01_sfnt_off00006ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA3 10016 bytes
SHA-256: f70886a2286f258713d01a5b3a6138abda477a29aa59c4055b7bf53467ccfa19

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