Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea901283ff1bac0b…

MALICIOUS

PDF

49.4 KB Created: 2020-08-04 03:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4d9fb288c2acebe28557a6f7edfe120 SHA-1: da8f8c122c595e7ce3b09f69b3f048441e4c977f SHA-256: ea901283ff1bac0b33a43b13b702213540cf63229fdf037bd070048428b06b17
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded URL points to a redirector service, which is a common technique for obscuring the final malicious destination. The ML classifier also strongly indicated maliciousness. The document body contains the same redirector URL, reinforcing its role in the attack.

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=aion+carl+jung+pdf+free In PDF document text
    • http://files.maryscheesecakes.com/uploads/1/3/1/3/131398457/bukun.pdfIn PDF document text
    • http://files.kathrynwedge.com/uploads/1/3/1/4/131438240/makokam.pdfIn PDF document text
    • http://bofox.tamusrt.org/uploads/1/3/1/8/131857334/7668e69.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/1/0428/9835/8432/files/69296453687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/vakipekusig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/xexemeru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/gukupajuwadegimovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/twas_the_night_before_christmas_poem_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4490/files/86201573878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6992/2714/files/38950883594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/jigavonomivit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/buxovupupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/meyers_snow_plows_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/75868269602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/20930341960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6630/0318/files/30887427127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.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
🗂 Part of campaign: maryscheesecakes.com 4 samples

Related samples 2

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_off000080ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80ED 5208 bytes
SHA-256: f4e5d463cc7872bf5298ee4a87f311f80c44b5e2ad2339692a3d5a70b13cd108
font_01_sfnt_off000092bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92BD 10620 bytes
SHA-256: 6bf5bb2f795f85339eb63a5ef1e79b07cf5af1b0367238f6a8fd60065cc57499

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