Malicious PDF — malware analysis report

Static analysis result for SHA-256 27bcb42f3c42cda3…

MALICIOUS

PDF

37.6 KB Created: 2020-08-13 22:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ffd130a22b546f7b831868d5d4971515 SHA-1: 6092fdb0eca9fc68f78a4c94138630cbbfa2ea9e SHA-256: 27bcb42f3c42cda3c422e020d23a88e2e3d654ad6070de7b1b28dced244771c5
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms or redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The document body, though partially corrupted, suggests a lure related to "carbon cycle model answer" to entice users to click on these links. The primary malicious redirector identified is https://ttraff.com/pify. The file's purpose appears to be directing users to potentially malicious or unwanted content through a network of linked PDFs.

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=carbon+cycle+model+answer In PDF document text
    • http://bukejajax.nikkiallred.com/uploads/1/3/1/3/131383297/mamariragiji_jiruxogo.pdfIn PDF document text
    • http://files.hunyuansingapore.com/uploads/1/3/1/0/131070207/8302381.pdfIn PDF document text
    • http://tugimu.madebymitchell.com/uploads/1/3/1/4/131406082/d0717ac7.pdfIn PDF document text
    • http://files.thefuzzyrooster.com/uploads/1/3/1/4/131438046/zepetuwa.pdfIn PDF document text
    • http://files.downersgrovecpr.com/uploads/1/3/2/8/132814990/b84f0ab764f3.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/1/0428/8158/1209/files/likixatonebajakasanatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4800/0922/files/sefudugutanepirodow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2913/5521/files/grade_5_math_worksheets_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/ielts_academic_writing_practice_test_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/jalodusoxus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/91165161126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/88637970472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4693/6482/files/zilawebexavaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4133/6989/files/beneficiation_of_iron_ore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/83765245567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2039/3375/files/3546054598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/el_caballo_de_troya_libro_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6482/6773/files/84723012234.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_off00005433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5433 5324 bytes
SHA-256: c02f508a1c180f7a7e8091e41d2507f95f4f25565edb7ff4450e272c2c1b2662
font_01_sfnt_off00006642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6642 10396 bytes
SHA-256: 28b62132c2355b97b9e2efaa49b0cad8cd8d10f4be9375169409227fa3c47e72

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