Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f42db754a3e25e7…

MALICIOUS

PDF

62.1 KB Created: 2020-08-01 13:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ebe732e9851389fa4414637f74c5c60 SHA-1: 28b94bf2a4b5ba293db185d708fcd1130389f6a5 SHA-256: 4f42db754a3e25e755fb862d216442e9e09ceca5a8ddc579a56d4fa8311dc696
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary URL pointing to a redirector service. This suggests a phishing or malicious content delivery attempt, where the redirector is used to obscure the final destination. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=new+vegas+jsawyer In PDF document text
    • http://files.rachelfayegallery.com/uploads/1/3/1/4/131453918/759c7a687fe6bb8.pdfIn PDF document text
    • http://files.belllog.org/uploads/1/3/0/7/130775827/2358242.pdfIn PDF document text
    • http://files.kafyeblaan.com/uploads/1/3/1/8/131856381/becb5.pdfIn PDF document text
    • http://files.northwestcoinclub.com/uploads/1/3/1/6/131636651/5623884.pdfIn PDF document text
    • http://files.patchesfamilycreamery.com/uploads/1/3/1/3/131380308/sugumidomifusu_mumopisisamigak_saxabudode_paxinebiv.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/1/0434/0216/6428/files/1239204219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/xutikikoxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/4021899241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/83218050191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/jivoluxud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/diregagurewowarurax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/dmc_5_unlockables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/85908711135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/nintendo_switch_dns_2110_3127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1083/4077/files/30256644322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/71726891600.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_off0000b697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB697 5120 bytes
SHA-256: 56090c5435abc91d40d7924475bf2a10114abed9a765a00326815944d1734d5c
font_01_sfnt_off0000c83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83C 10360 bytes
SHA-256: 76d8f881c1dc01994ae84a49a11d584e771f901f7468c379ac94782816ad2dbc

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