Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b242a5e46b22c03…

MALICIOUS

PDF

57.0 KB Created: 2020-08-03 13:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 091d8252031631b48d10f8316fe7520e SHA-1: 3b436afc704e7c49688ef7f1385514730cb56e53 SHA-256: 9b242a5e46b22c03bd6e93d1e14dedc0c2546f693b9f825f3b9ff2b00fc9b3b4
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, including one to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=bienestar+emocional+y+desarrollo+humano+en+el+trabajo+pdf`. The heuristic `PDF_SEO_LINK_FARM` indicates a mass external PDF link farm, suggesting the document's primary purpose is to distribute or link to numerous other PDFs, potentially for SEO manipulation or to host malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=bienestar+emocional+y+desarrollo+humano+en+el+trabajo+pdf In PDF document text
    • http://files.carolinachildrenstheatre.com/uploads/1/3/1/4/131452938/3298903.pdfIn PDF document text
    • http://files.crappymagic.com/uploads/1/3/0/7/130740033/5923224.pdfIn PDF document text
    • http://files.g2gdrivingacademy.com/uploads/1/3/1/6/131606408/3527493.pdfIn PDF document text
    • http://files.carolynlaine.com/uploads/1/3/0/8/130874192/9439414.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/1/0431/5119/6315/files/rumuripidaxabonefekugun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/90295484950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/dunobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4485/4165/files/foriga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/29832196748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1185/0918/files/matakuxerow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/wubiripenux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/zubimivojowazuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4637/0471/files/dolegubegubuvewilip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2131/0875/files/21035766198.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E78 3052 bytes
SHA-256: d25e736f33f45d9360a48f0278070fcb41c68dcb6f7c532bfde4f3dea8d2929b
font_01_sfnt_off0000996c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x996C 5760 bytes
SHA-256: 2fff451dbe7fb77d5cd144ba38aeda1776f61e49175827abc44f1eaf2b88c909
font_02_sfnt_off0000acdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACDF 12452 bytes
SHA-256: f4c742351b34c79f8de3b6b4c638907e8bb963120beafe18d6bd7844c0f81c65

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