Malicious PDF — malware analysis report

Static analysis result for SHA-256 436b63d9847741bd…

MALICIOUS

PDF

46.7 KB Created: 2020-08-12 04:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bdb14a53682accd786b7c0a0f5a3f6e2 SHA-1: e51458ee9631a3892e061f628608d24a00e1a72a SHA-256: 436b63d9847741bd8ef5aedae084c298ca8e2966b40d13d98b4a986e3679d3db
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, https://ttraff.cc/pify?keyword=chronic+prostatitis+symptom+index+pdf, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains this URL, suggesting a lure to external malicious infrastructure.

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=chronic+prostatitis+symptom+index+pdf In PDF document text
    • http://tevupe.neverthirstagain.co.uk/uploads/1/3/2/6/132682883/fagitoxebiti.pdfIn PDF document text
    • http://beladataj.uniquelearning.ca/uploads/1/3/1/4/131407089/4165113.pdfIn PDF document text
    • http://files.brittanywoolsey.com/uploads/1/3/1/3/131383943/sidaxanitawijid_juwakobe_vezevodedeje_turebuzasedo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/31942082208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7827/1651/files/nomenclature_of_cycloalkenes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/73767774487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/53747218625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/optoelectronics_and_photonics_kasap_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0740/8290/files/wefojamebuvarazudure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/banavipubugasimipuwegafaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/similar_triangles_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0378/9991/files/mulukolunumejesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4678/8502/files/74497972348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3538/6275/files/gezikesurojir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9854/6084/files/tejoj.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D1 5344 bytes
SHA-256: 0bbf39e907cb4ff91f22fcc7bd3ad51a5aa6d7855a225918e0eee8ea6022c367
font_01_sfnt_off00007bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD0 10484 bytes
SHA-256: 81249efdd5a3a62bb1b44214bb57075ba922517017877447748b245ba28b7e97
font_02_sfnt_off00009f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F80 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34