Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b30373f4a8bd1a8…

MALICIOUS

PDF

50.7 KB Created: 2020-08-10 14:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4315a4ce876cd2e5c00f24f4bc412747 SHA-1: af8e6fbaa8cc26cb7a8b2339a03b67765f8aaead SHA-256: 5b30373f4a8bd1a8a2e6969ac514c544c09df05f11e198afaf3f54026b284f99
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service designed to obscure the final destination. The primary redirector URL is associated with malicious activity, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to direct users to harmful content. No scripts were extracted, but the presence of many links and the ML classifier's high confidence indicate a malicious document.

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.com/pify?keyword=types+of+genetic+mutation+pdf In PDF document text
    • http://difiv.heritagepumps.com/uploads/1/3/0/7/130775403/jekake.pdfIn PDF document text
    • http://files.adorote.org/uploads/1/3/1/8/131871704/7040157.pdfIn PDF document text
    • http://files.woodenitbenice4u.com/uploads/1/3/1/4/131483083/5604715.pdfIn PDF document text
    • http://files.armarnib.com/uploads/1/3/0/9/130969220/6413204.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/1/0432/7600/9622/files/zuvokijag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2200/7965/files/acupressure_points_for_back_pain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/vaimanika_shastra_book_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/65565064132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/49251792612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/68774328805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/chava_marathi_book_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/english_for_life_beginner_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/96258737819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/vozasugamirelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/california_bar_registration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4051/7792/files/tropic_of_capricorn_henry_miller.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/9438859350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/59782254640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/jonirugo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8801 5396 bytes
SHA-256: 88ff86d90d1579d1bae4b237b6b8b73f9c4c58ae53127ad9506ff3e1b2644661
font_01_sfnt_off00009a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5F 10256 bytes
SHA-256: f4d3006823ce6148f8b1b96d5bf76d147057fda64f91585b61fac552a3a8fd17