Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdd0077225afdc7…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 14:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e25eccae36062ea253336c0e4e9647f SHA-1: eb015edd7640ea964b75da6a70e4b64967f445ba SHA-256: 8cdd0077225afdc724de5a1a434a1b3f515679113770846f0cb66b65497cab7c
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to malicious infrastructure. The document body text, though partially corrupted, mentions 'tactics for toeic listening and reading test pdf descargar gratis', suggesting a lure for users seeking study materials. The primary malicious link identified is https://ttraff.cc/pify?keyword=tactics+for+toeic+listening+and+reading+test+pdf+descargar+gratis, which is likely used to redirect victims to further malicious content.

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=tactics+for+toeic+listening+and+reading+test+pdf+descargar+gratis In PDF document text
    • http://files.yourpoolguy.ca/uploads/1/3/0/9/130969895/duratu.pdfIn PDF document text
    • http://files.aidasalazar.com/uploads/1/3/0/8/130874012/30836c31cbeac.pdfIn PDF document text
    • http://pivuvaf.juliaperdrial.com/uploads/1/3/1/4/131406390/minaxokipes.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/1/0428/8184/3353/files/vofasanupolupigaxefetilak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/makowukul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9543/3117/files/17938268637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/mekuxoxevunumox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1495/2859/files/89767573098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/pelesunebekebafixulevusuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/gofipupadiduvuxim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/franchising_your_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/44991433538.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_off000057f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57F5 5060 bytes
SHA-256: be5391ac6c9cbdfac5497affa09c2ad2511fcfa9cca6f1d9440aca9ad47126bf
font_01_sfnt_off00006929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6929 10216 bytes
SHA-256: e5abddb89ceaa3c2229b08b938b2353c3a4ddfb46e88b2ac30eee6787e8016cf
font_02_sfnt_off00008c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C18 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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