Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9cb31b2f3aba20…

MALICIOUS

PDF

34.4 KB Created: 2020-08-11 06:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9eb21e13878483201eb946817e939d71 SHA-1: 3b6444b51d32ff2d30a631d6eaade7ab30118178 SHA-256: 4d9cb31b2f3aba2061ba56ce8958e872a8021cac20ff9724bfeb84b964718508
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a link farm with numerous external PDF links, many hosted on Shopify, suggesting an attempt to obscure the true destination. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.cc/pify?keyword=catalogo+mary+kay+maio+2020+pdf, which is likely used to redirect users to a malicious site.

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=catalogo+mary+kay+maio+2020+pdf In PDF document text
    • http://riwut.mrssiegelsecondgrade.com/uploads/1/3/1/8/131856158/6942278.pdfIn PDF document text
    • http://lakekaza.scpassportandvisa.com/uploads/1/3/1/4/131453133/d61d4c5eec.pdfIn PDF document text
    • http://files.profjbh.com/uploads/1/3/2/3/132303337/voretonitu.pdfIn PDF document text
    • http://files.coffershousingsolutions.com/uploads/1/3/2/6/132695213/bazajab-dateruripol-jesewagij.pdfIn PDF document text
    • http://files.thejharrisdesigns.com/uploads/1/3/2/3/132302819/kikikapiduzizatido.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/1/0428/9835/8432/files/zijuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/definition_of_qualitative_data_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/61053419621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/nuzuworodafugadiwafuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/movimiento_muralista_mexicano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/29978199648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/notil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/61059766912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/functional_requirements_of_walls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/34388053900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/10365969254.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_off000048da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48DA 5528 bytes
SHA-256: 5ddc06a9d12d60a7ee3b1d7d62a0c5b3e0809fdd5920ce64efcc925294dcaf9e
font_01_sfnt_off00005ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA1 9632 bytes
SHA-256: b4449b52cb93b562784daee58583b9d687b43b415d554cd033797742ad4ffd56

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