Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7e03817ed1451a…

MALICIOUS

PDF

54.2 KB Created: 2020-08-11 09:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 964f0e28ec6822e3e274dd37ea1d9db7 SHA-1: 79252f216a4b7708d83f50ffc22f898fad77cde6 SHA-256: 4b7e03817ed1451aeb554530a1e8897f343d137deffc9b1eae50fcedc0fe3415
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Android developer tools tutorial pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious URL is https://ttraff.cc/pify?keyword=android+developer+tools+tutorial+pdf, which is likely used to redirect the user to a further malicious destination.

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=android+developer+tools+tutorial+pdf In PDF document text
    • http://files.thewoodroom.co.uk/uploads/1/3/1/1/131164488/sogopewajabadujug.pdfIn PDF document text
    • http://files.comoxmobilemassage.ca/uploads/1/3/1/4/131437380/8790015.pdfIn PDF document text
    • http://files.saynerstgermainfishandwildlifeclub.org/uploads/1/3/1/4/131437535/3612493.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/1/0436/5497/1557/files/78825218084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/ce2252_strength_of_materials_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/69070654095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/wowixibugosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/sudoguditegato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/kabarakawovoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/vobabebusuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7941/6473/files/convert_perl_to_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/cisa_certification_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/ligeramente_peligroso_mary_balogh_descargar.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_off000095ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95CE 5084 bytes
SHA-256: 1cd35ae4f893c739f1fde51a9ee865d367debb1aea84323e89ca7a5282c8be7e
font_01_sfnt_off0000a72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA72D 10840 bytes
SHA-256: b0a679782d6bee8ebe93b563d154697f6bdfd2b88952fa50ce284e8d399082c4

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