Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb57f77adca1d67…

MALICIOUS

PDF

47.3 KB Created: 2020-08-09 01:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 044b2c66b264e87e2599259b9b0e5d97 SHA-1: bcf476e4cf3004d9cfbb76d62fd7e29e73225333 SHA-256: cdb57f77adca1d678f6b6cf02e09ded2d06efb74096e3c27603669f9f3c46de3
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is ttraff.com, which is known to host malicious content. The document body contains garbled text but includes the malicious URL, reinforcing the attack pattern.

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=biodiversit%25C3%25A9+microbienne+pdf In PDF document text
    • http://gufup.cindymcclary.com/uploads/1/3/0/7/130776485/wijosoxip_besefejul_wibesunevup_garoramumupa.pdfIn PDF document text
    • http://files.montessoridonelson.org/uploads/1/3/2/7/132711999/5894191.pdfIn PDF document text
    • http://files.tylerjonesmusician.com/uploads/1/3/1/3/131381640/xexakakuroloroba.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/1/0432/1892/7775/files/24538684355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8321/6549/files/fotapizozekevavatokajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/70129399146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8662/4406/files/verbos_conceptuales_procedimentales_y_actitudinales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/star_wars_the_last_command.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/akbar_birbal_chutkule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/lalaxamudofopefawixori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/datetilifisaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4945/0663/files/zeralirifawepavagol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/java_string_to_date.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/xilekiromiko.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 4

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_off000068a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A7 5240 bytes
SHA-256: 39ce1b8d4a08862a8c12306a1f322c83dc0637848b20d1b1b9026332a36e7228
font_01_sfnt_off00007a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A19 12136 bytes
SHA-256: 3dc474fc345af6e01b77bc4c0b40956954bbdc419be13a93f408d55a449de603
font_02_sfnt_off0000a065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA065 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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