MALICIOUS
242
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.001 Malicious Link
The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, appears to be a lure related to an exam paper solution, combined with a call-to-action phrase. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm intended to obscure the malicious redirector.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 7
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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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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.ru/wb?keyword=upsc%20csat%20paper%202%202018%20solution%20pdf In PDF document text
- http://files.rykiephoto.com/uploads/1/3/0/9/130969470/bdc249.pdfIn PDF document text
- http://files.bidwellwildliferehab.org/uploads/1/3/2/6/132682607/kuxef-wokelalu-xonod-pixanago.pdfIn PDF document text
- http://files.hillingdongurkhanepalesecommunity.co.uk/uploads/1/3/1/4/131408928/puwizovik-vawater-tifirameloposod.pdfIn PDF document text
- http://files.oiim.net/uploads/1/3/1/4/131453193/241733d9fb88e9.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/1/0430/1357/0709/files/lifetonujo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/3706/5370/files/62282481321.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/1143/2857/files/3421131446.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7049/6672/files/dofadetijunete.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34888362351.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2341/6987/files/denosivikevemufatine.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/4760/0807/files/lurunazirika.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/0916/0862/files/nepemejizazujaxubojine.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6090/3582/files/fadifasixarifawufewuj.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6717/9165/files/mozidimub.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4296/3613/files/valosukasifomed.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_off0000d7f5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD7F5 | 5540 bytes |
SHA-256: a439275d2eccae3680ed8241196aefd84300600ff0c9aefa8b41e0de9f7ce19f |
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font_01_sfnt_off0000eada.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEADA | 10832 bytes |
SHA-256: 7f76874bc8e55208d539736dc949d713caea26831e066cda1c9ddf3a2776317a |
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