Malicious PDF — malware analysis report

Static analysis result for SHA-256 603f515bb9cc070a…

MALICIOUS

PDF

39.6 KB Created: 2020-08-24 09:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae30e03c1d25004996005d91d495c3ec SHA-1: 890672c7ddd2fb77aed3e3de62f21fbdc3f68b24 SHA-256: 603f515bb9cc070a366222fd7ad46b3eb97c41273914a279746902c3e623a25b
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as a free download for a textbook, but they redirect to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is part of a link farm aiming to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=understandable+statistics+10th+edition+pdf In PDF document text
    • http://files.mr-stevens.com/uploads/1/3/0/7/130776864/zoxakaso.pdfIn PDF document text
    • http://files.npdwc.org/uploads/1/3/1/8/131856232/kadawox_rifumijuvev_zokakilulalen_wowatepa.pdfIn PDF document text
    • http://zemanuge.healthybalancedbodies.com/uploads/1/3/1/0/131070420/fezatiwi_pexezurutar_temonuzupup.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/1/0435/5417/7185/files/fejotaroxala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7880/9768/files/18066587241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/dufilekoradetotux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/wifezolovafadifituwebej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/entrepreneurship_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/ginodajavidupuzufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5362/0136/files/31435372308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4870/4917/files/immunoglobulins_types_and_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/18135275499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/29154844043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/60497917457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/mewaburide.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_off00005b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9D 5568 bytes
SHA-256: 4f0ce8e25eade83aa3241337414d6465e65f9fc481a0f7b932232a97f29c8a22
font_01_sfnt_off00006e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7F 10240 bytes
SHA-256: 8d79874ca5b832c6fd49162c17fadee41e964ce762325cff5254c0e113d7f9f3

Open this report in the interactive analyzer, or submit your own file for analysis.