MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=grammar+in+use+ti%25E1%25BA%25BFng+vi%25E1%25BB%2587t, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on various domains, suggesting a coordinated effort to distribute malicious content or phish users.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF 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.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF 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.
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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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=grammar+in+use+ti%25E1%25BA%25BFng+vi%25E1%25BB%2587t In PDF document text
- http://files.jakebiondi.com/uploads/1/3/1/4/131407152/63a3fdc40aac0.pdfIn PDF document text
- http://files.bergmanlandscaping.net/uploads/1/3/1/3/131384679/29ef81501bbc537.pdfIn PDF document text
- http://files.kronicsensations.com/uploads/1/3/1/6/131637224/d3a39.pdfIn PDF document text
- http://files.murrayseniorcenter.org/uploads/1/3/1/4/131437669/2511479.pdfIn PDF document text
- http://files.nationalroadchurchofchrist.org/uploads/1/3/1/3/131379894/gufewu.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/1/0435/3651/5224/files/19068989107.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4904/9499/files/88411962823.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/5407/8871/files/63003288320.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4173/4311/files/masokow.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/6612/0609/files/textview_background_color_android_studio.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8577/4502/files/93674823286.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/6769/5509/files/popolok.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5721/6678/files/javascript_caesar_cipher.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8097/4490/files/witatazefomabukeguz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3250/1656/files/modals_exercises_advanced.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6961/2966/files/genetics_from_genes_to_genomes_6th_edition_free_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4398/7361/files/robert_greene_mastery.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
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005b26.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5B26 | 5404 bytes |
SHA-256: 8acece2e390e2f33e404fc13b6be5c5a699a5bcc3199fc3d4d54962ee963cd11 |
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font_01_sfnt_off00006cec.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6CEC | 10864 bytes |
SHA-256: d9069704d95f928fcd85d53abacb475b1669a1c7768586c246449784e2795019 |
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