Malicious PDF — malware analysis report

Static analysis result for SHA-256 841019b9df9bc4d0…

MALICIOUS

PDF

55.5 KB Created: 2020-08-06 05:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 901bd97459cc70a22ff4ed8ea40656f5 SHA-1: c5237ebafcdfd661721cccc718354bc7f0c13e23 SHA-256: 841019b9df9bc4d036ab518704c0d7f1e35063e5605f44ab7a3fd3aaa0958502
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including a primary redirector URL, that masquerade as download links for books, likely to phish for user credentials or deliver malware. The ML classifier strongly indicated maliciousness, and the presence of redirector links points to a phishing or malware distribution scheme. No scripts were extracted, but the document structure and embedded URLs suggest a social engineering attack.

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=the+time+machine+penguin+readers+level+4+pdf In PDF document text
    • http://files.rathfrilandmotorclub.co.uk/uploads/1/3/2/3/132302913/zomawuzivoludi_petusol_mufawukemur_xitedelufukojob.pdfIn PDF document text
    • http://puvuraje.citadelhomeinspections.ca/uploads/1/3/1/4/131408738/4088736.pdfIn PDF document text
    • http://files.dkgalphachapter.com/uploads/1/3/1/4/131482887/nefof_difojokemeforer_jivuxaduzapaf.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/1/0431/3707/3314/files/zavot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/residential_landscape_architecture_6th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9408/8616/files/circle_with_dot_in_middle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9973/2633/files/6927387391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/fegobajiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2904/4127/files/agreement_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6041/8970/files/95732386266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/curso_de_violo_intermediario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/62116242183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/60463060325.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDD 5664 bytes
SHA-256: 7c50d17a9ee9280c80da86fa8faac31da617649274ed50772b0c7d92e266e6a3
font_01_sfnt_off00009303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9303 10772 bytes
SHA-256: 936c990f14c4e503d6c4bedc8e6905416cc904844af46e8313172deffc9b1125
font_02_sfnt_off0000b7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E9 17132 bytes
SHA-256: 3d569202a327060c188859987a1d4b8185c78b00fe686aaf0eeda8bdc2ce2657

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