Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef0429005d506e7…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 02:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5216e8d6d7d7fc0ce5fa47884c720ed1 SHA-1: 5dcde10f1724907c182ecac170e7fd0e2b4e48d3 SHA-256: 4ef0429005d506e75130ec2ad076347c612a4d19491d7ae305e593d1cbb7aab2
194 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to generate search engine traffic, with one critical link pointing to known malicious redirector infrastructure. The embedded URL leads to a redirector that likely serves malicious content or further phishing attempts. The document body, though heavily corrupted, contains text related to advertising media and the wkhtmltopdf tool, suggesting a lure for SEO-based traffic manipulation.

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=advantages+and+disadvantages+of+advertising+media+pdf In PDF document text
    • http://diwig.wanderingsolace.com/uploads/1/3/1/4/131453027/fisunipen.pdfIn PDF document text
    • http://files.ovband.org/uploads/1/3/1/6/131607827/4415427.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/94896688222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/zazadoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2679/1075/files/voxiluliwofometu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/87197711659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0310/0832/files/guest_reservation_form_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/weather_for_newark_de.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7127/5943/files/caresse_sur_l_ocean_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/xolepomegisixus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6092/0219/files/36465949707.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 3

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_off00006533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 5164 bytes
SHA-256: 396875bfc1211f4d15aea2e2a562c2ee75b23e534e00d9cfa6cc221edb4f09bb
font_01_sfnt_off000076b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B5 10184 bytes
SHA-256: 549b9d9667b9b1ecc80584d448bde5219211292e46444f3792c84dfb3916f4db
font_02_sfnt_off00009979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9979 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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