Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3562d52b7f24ad…

MALICIOUS

PDF

52.1 KB Created: 2020-08-02 16:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1d61f05b5a57ae9e44b23da5e701097 SHA-1: b70170f862316d58d99f0d773a1e9a771a9fdb7f SHA-256: 4d3562d52b7f24ade8067b7bd894eee1050ed1ad0db640c2d1463e463ccbd0f9
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to obscure the true destination or to engage in SEO manipulation for malicious purposes. No scripts were extracted, but the PDF structure and link analysis are sufficient for a high-confidence assessment.

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=unity+break+prefab In PDF document text
    • http://files.springdalesva.com/uploads/1/3/1/4/131438142/1456653.pdfIn PDF document text
    • http://files.awuahlab.com/uploads/1/3/1/4/131407492/tazatoxomuni_resefit_sesebumuwodade_zemetaxis.pdfIn PDF document text
    • http://files.lathamhomesanitation.com/uploads/1/3/1/4/131407148/6056627.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/1/0435/3739/9957/files/peanuts_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5654/6463/files/12098574620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/67036673948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/xurofurufafil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/noxewezididixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/47152288575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/3265682087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/wekire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/riwus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/72786691917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/21811377767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/sovedimun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/9347901621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/66194308829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/kendrick_lamar_damn_torrent.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_off00008f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F50 4980 bytes
SHA-256: f51584b6d475948fab869b88aeff221fbd8824b3352afe884dfefab7f82c463b
font_01_sfnt_off0000a062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA062 10176 bytes
SHA-256: 6e9a438f167d17ce87848696d01cc936070225a1a3a38b5c67c58833aeccbac7

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