Malicious PDF — malware analysis report

Static analysis result for SHA-256 4032fd0c0899b9db…

MALICIOUS

PDF

42.5 KB Created: 2020-08-21 07:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59bc20cad27b647784298325e8616318 SHA-1: 261938f025d67513e9b7691f6007e88cf1e3d1e6 SHA-256: 4032fd0c0899b9db8bf66396a087f12456eca7312a9d64a99450a8b08cb190d4
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=adobe+reader+9+filehippo'. This URL is designed to trick users into downloading software by impersonating a legitimate download source. The document body also contains this URL and references 'Adobe reader 9 filehippo', reinforcing the lure. The presence of a mass external PDF link farm further indicates a malicious intent to distribute content through deceptive links.

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=adobe+reader+9+filehippo In PDF document text
    • http://files.katyscarlett.com/uploads/1/3/0/9/130969241/63e9b81.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/lozafawofife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0599/1321/files/dororo_imdb_parents_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/formulaire_attestation_d_employeur_destine__ple_emploi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0128/2719/files/honda_element_manual_transmission.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/besharam_movie_mp4moviez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/present_simple_vs_present_continuous_exercises_upper_intermediate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/area_of_shapes_quiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/sitodovowuvalowutinodexer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/9489/4744/files/past_tense_irregular_verbs_exercise.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 4

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_off00005f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 5236 bytes
SHA-256: 13bbe4e9d0958fc3a237a163fd0aa4948a6d6264631a1fc6a0e3b96aed997c3b
font_01_sfnt_off0000710c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710C 14332 bytes
SHA-256: 4e0b5aa5a8252f25624eda97d4fbeaec2846bbe68bfc2610fabfb4aff7776c78

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