Malicious PDF — malware analysis report

Static analysis result for SHA-256 615060903c2b40e6…

MALICIOUS

PDF

63.6 KB Created: 2020-08-17 14:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af9d1d10a5b64ea36a44b8e2637812e2 SHA-1: b64f0ed9e893e12d61f8ee641b647b63a3579145 SHA-256: 615060903c2b40e65586dd96dba4933a885f6485b0b84fbda886907846b0a897
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector infrastructure associated with malicious activity, specifically a lure for 'cambridge english exam pdf'. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's part of a link farm designed to distribute content, likely malicious. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing pages.

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=cambridge+english+exam+pdf In PDF document text
    • http://files.vtstarter.com/uploads/1/3/1/4/131454719/kimakinoxuxo.pdfIn PDF document text
    • http://files.dianneforsythphotography.com/uploads/1/3/1/6/131606482/87035.pdfIn PDF document text
    • http://files.garyantleproductions.com/uploads/1/3/0/9/130970004/6b5d15.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/1/0431/6341/8784/files/cheat_engine_6._7_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/fofur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/lafoguramawavemepuxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/40811378193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/45284973056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/verupuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/duvegofokamituveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1872/1192/files/buwaxadomodubelule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/wugupivezoretim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/17654000957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5783/0298/files/79004170092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1263/2221/files/how_to_crop.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 1

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_off0000bb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB43 5568 bytes
SHA-256: d6c542e55d28e2b507ebb4a995f00311789ee2551c76db3a96ae996cc241373e
font_01_sfnt_off0000ce04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE04 10472 bytes
SHA-256: 72fe2bf43bd47b5c96e87124bf9158bd7a15d055d1573cd00f4883d12eadb5a1

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