Malicious PDF — malware analysis report

Static analysis result for SHA-256 18db8d82fb2dfd45…

MALICIOUS

PDF

40.8 KB Created: 2020-08-05 02:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c75997917f6e806738259c9c59e35872 SHA-1: 347678fedb22a08cc5731692a4c8f022a7ce6572 SHA-256: 18db8d82fb2dfd452cfdbe73909c93ee05e6fd2f2edfc7b8074c6aa9ec978f41
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a link farm, likely as part of a phishing or scam campaign. The document body text, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=mathematical+algebraic+formulas+pdf, which is identified as a malicious redirector. The presence of numerous other PDF links further suggests an attempt to manipulate search engine results or distribute 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=mathematical+algebraic+formulas+pdf In PDF document text
    • http://files.alexandradeviveiros.com/uploads/1/3/2/8/132815045/1709497.pdfIn PDF document text
    • http://files.nordicwalkinglondon.com/uploads/1/3/2/7/132741144/ruped-makis.pdfIn PDF document text
    • http://kofiwi.fat2fitclinic.com/uploads/1/3/1/6/131606636/vovalofir.pdfIn PDF document text
    • http://files.naba-hairstreak.com/uploads/1/3/1/3/131398142/6492625.pdfIn PDF document text
    • http://files.chris-palmieri.com/uploads/1/3/0/8/130813582/pojafuseperojoz.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/1/0431/2078/7613/files/ana_catalina_emmerick_visiones_y_revelaciones_completas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/bharathiar_university_distance_education_model_question_paper_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5950/1464/files/east_west_bowl_key_and_peele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/lagofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/30537408353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9612/1248/files/25221829717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/architecture_technical_drawing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/bootstrap_3_breakpoints.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/bjt_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/42609446035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7668/8799/files/lawatebafikuwudawa.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_off00005e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 5716 bytes
SHA-256: 9f25e12195088eac314febb3349e2553ed28f0eb765a2a8d80796d0eada04001
font_01_sfnt_off00007168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7168 10852 bytes
SHA-256: d38b75d3699e82e4dbd51476e46045fbdaa24c9f4ef9bf218107ba3dd74ebf7e

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