MALICIOUS
234
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=4+digit+addition+with+regrouping+worksheets+pdf'. This suggests the document is designed to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.
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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Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISHDocument impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://ttraff.ru/pify?keyword=4+digit+addition+with+regrouping+worksheets+pdf.
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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/pify?keyword=4+digit+addition+with+regrouping+worksheets+pdf In PDF document text
- http://files.coraleyletcher.com/uploads/1/3/1/3/131378921/kegavikex_fasoje_vodiredarumese_labesol.pdfIn PDF document text
- http://files.quiltingshanty.com/uploads/1/3/0/9/130969364/rarekekiseni-rezusena.pdfIn PDF document text
- http://files.therealestatestagingstudio.com/uploads/1/3/1/4/131407492/f9a287dd.pdfIn PDF document text
- http://files.alwathiqdubai.com/uploads/1/3/1/0/131070149/856afd04d.pdfIn PDF document text
- http://files.ejpendergraft.com/uploads/1/3/1/3/131379040/jugijap-mewidatunupina-zujaxifomidas-vuwobikanojix.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/1/0437/8345/4871/files/41801363170.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8236/6629/files/52185441442.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/6333/5326/files/95302572139.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5366/1858/files/xotedoxuzogitavivik.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/0935/9520/files/sovurido.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8720/0418/files/tuwoguwowotiniviwowexok.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/4264/1832/files/75602082117.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/5946/8701/files/kozatemukezebetebiloteruz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/9021/3019/files/vuvaboritibabarevapafek.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7259/3820/files/64304747936.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/0649/2823/files/lazodasifofemodipunu.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_off00006209.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6209 | 5420 bytes |
SHA-256: 0413417bd90d51137202ac4a34ca61ab7e768e81dd2f589a545f540942c90300 |
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font_01_sfnt_off0000748e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x748E | 10176 bytes |
SHA-256: 12313a01bba81139ea961e50029d17c83b3c2629a537155dc3e23e891400d4cb |
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