Malicious PDF — malware analysis report

Static analysis result for SHA-256 4582fbae84ee1d42…

MALICIOUS

PDF

39.8 KB Created: 2020-08-11 20:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6dfffdc75003807384c8b984bc073c04 SHA-1: ca7df1737a7547dfc9c268793bca82be9bf7e88e SHA-256: 4582fbae84ee1d425220cc0eaab00b66b994194c201b19c346e2a6c9ccc24476
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary URL pointing to a known malicious redirector. The heuristic firings indicate that this PDF is part of a link farm, likely intended to manipulate search engine results or redirect users to malicious sites. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector strongly suggest a malicious intent, possibly for SEO spam or as a lure for further attacks.

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=sing+hallelujah+to+the+lord+chords+pdf In PDF document text
    • http://files.gretchenjude.com/uploads/1/3/0/7/130739510/lawikeluvige-vijipafigu-sazelax.pdfIn PDF document text
    • http://files.ct-200.com/uploads/1/3/0/8/130873947/7531796.pdfIn PDF document text
    • http://files.hereamiafrica.com/uploads/1/3/1/6/131606011/lanidolov.pdfIn PDF document text
    • http://files.mariacarella-yoga.com/uploads/1/3/1/6/131636946/2398524.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/1/0428/6464/0159/files/91429271132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8443/2038/files/62059658556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/57122992138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/93037155077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/asus_usb_charger_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/susezatuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4581/3414/files/wutokamajirobolofupul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/nobuxibapotiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9662/8641/files/biology_mcq_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7145/4883/files/gujapubazedagaxitadebi.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_off00004fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FBA 5596 bytes
SHA-256: 8c9c5aae34840bd10303fb4cffb0011ff2dc7d7d64e36a32f5a2fad691d52739
font_01_sfnt_off000062b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B7 14656 bytes
SHA-256: 8af697a3bcde80fd77c177eafbdeef791b929bcbb21ec99951b4194900f81519

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