Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdcda173958c806…

MALICIOUS

PDF

52.5 KB Created: 2020-08-25 21:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8540dce3cff4c75724d13c1a404481d SHA-1: e82be203197b4dda9bc3fcd914575745c8b05bc1 SHA-256: 2cdcda173958c80617c35b9e93f5d0e94d3ab52539b5c3d91b6b1ea4dbb8e27e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to 'Estudios preliminares para el diseño de las carreteras' and includes the malicious redirector URL, suggesting a lure to external content. The presence of a link farm indicates an attempt to distribute or host malicious content via multiple domains.

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=estudios+preliminares+para+el+dise%25C3%25B1o+de+las+carreteras+estudios+socioeconomicos In PDF document text
    • http://files.blueheronsynergy.com/uploads/1/3/0/7/130738803/kojexal_xezax_xaxovipotirezuv.pdfIn PDF document text
    • http://ruvekanin.cnanj.org/uploads/1/3/2/7/132712572/lekemopumapefe.pdfIn PDF document text
    • http://files.crmoawareness5k.org/uploads/1/3/0/7/130740517/17756edf68.pdfIn PDF document text
    • http://files.laarmory.net/uploads/1/3/1/8/131871864/nataguwijuse.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/1/0435/2340/8032/files/simitifagul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/pukerudapebakikatole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/xowemezak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2123/6384/files/27426811807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/vikodopotivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/free_vpn_apk_s.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2595/6765/files/24437625751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/13216623850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9566/files/destilacion_por_arrastre_de_vapor_ventajas_y_desventajas.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 5

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_off0000892f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892F 5388 bytes
SHA-256: 963bec749ddae15900b7fe856a74519158a188500fde7d578318185c54ce16cd
font_01_sfnt_off00009b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B22 11556 bytes
SHA-256: 0f5e83a8b6e288b5757c01b72c604bdd3858d0825b971341c00940fd58147753

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