Malicious PDF — malware analysis report

Static analysis result for SHA-256 e766eb4fff92d4db…

MALICIOUS

PDF

49.9 KB Created: 2020-08-09 18:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6490b54d73abf6241e910e3049490cb3 SHA-1: 6b3c15cc768425472ebff867a4ba26001d8281f7 SHA-256: e766eb4fff92d4dbe7b31d156823282bcd940bc1148895c74b441fdf711bb3b1
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body text, though partially corrupted, suggests a lure related to a calendar, likely to entice users to click the malicious link. The heuristic firings indicate that the PDF is designed as a redirector link farm, leading to potentially malicious content.

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=calend%25C3%25A1rio+2020+com+feriados+rio+de+janeiro+pdf In PDF document text
    • http://files.latherrinse.com/uploads/1/3/2/6/132681863/4015169.pdfIn PDF document text
    • http://woxirof.emilyafield.com/uploads/1/3/2/7/132712358/midose_xofikeme_nojemi.pdfIn PDF document text
    • http://files.thencga.org/uploads/1/3/1/4/131438137/wujagozu.pdfIn PDF document text
    • http://nerip.casadeartegallery.com/uploads/1/3/2/8/132814930/newasewonanerajefag.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/1/0436/0057/6669/files/boberudilatamejebuviwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/42755846444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2452/3170/files/singh_vs_kaur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2227/0114/files/design_and_construction_of_automatic_voltage_regulator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/dojuvavifem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4197/2646/files/test_for_alkanes_and_alkenes_lab_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/karnataka_election_results_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/mobile_applications_architecture_design_and_development_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/lemebatorir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7526/2869/files/transport_phenomena_in_biological_systems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9671/0050/files/8235866095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.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 3

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_off00007c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 5792 bytes
SHA-256: 640770d9c5898a87bdc2a0ee8f33e50253a4d415885d6ba8787b7ae970a8cac2
font_01_sfnt_off00008f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F92 13196 bytes
SHA-256: a21ee162c81bc30c215cd8aec7f3b0ce1de27dc8d84148e5d44bf722bb6d8c4b

Open this report in the interactive analyzer, or submit your own file for analysis.