MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify, designed to appear as legitimate resources. One critical heuristic identified a link to a known malicious redirector, 'ttraff.ru', which is likely the primary malicious payload delivery mechanism. The document body, though heavily corrupted, contains the target keyword 'cambridge english advanced 2 examination papers with answers pdf', suggesting a lure to attract users seeking study materials. The ML classifier strongly indicated maliciousness.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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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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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=cambridge+english+advanced+2+examination+papers+with+answers+pdf In PDF document text
- http://files.lovekbeauty.com/uploads/1/3/2/6/132695418/9275083.pdfIn PDF document text
- http://files.firpoint.net/uploads/1/3/0/8/130813906/a42b541d2.pdfIn PDF document text
- http://files.alexmunroewrites.com/uploads/1/3/1/3/131384173/fovun_jixototedu_pojutebuvatevu_vibul.pdfIn PDF document text
- http://files.jlongkandb.co.uk/uploads/1/3/1/6/131606368/da1337258866eff.pdfIn PDF document text
- http://files.mustardfitness.com/uploads/1/3/1/3/131383763/nategexo_jidonamonewi.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/1/0435/9585/8088/files/gijajoratejevepetuv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8164/5736/files/adverb_and_adjective_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/1739/4586/files/61982643292.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5693/8646/files/6629363238.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6633/6167/files/66979870203.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/6903/7980/files/33894454379.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/9749/8535/files/kilupojetevidujomerisipe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/8184/3356/files/gubotixidoliwijaxar.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/6483/6764/files/dainik_bhaskar_epaper_patna_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3025/7568/files/rapegajaworobofozipim.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7026/7291/files/25466025784.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/9944/6693/files/vijagunorupob.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4460/9943/files/47693227513.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_off00006dc3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6DC3 | 5964 bytes |
SHA-256: 27c92fd300379e619c15ad1d27c0d7d1ab00cbcf0674b51f1b151fc1d29f0bfc |
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font_01_sfnt_off000081f7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x81F7 | 18176 bytes |
SHA-256: 97fe74925f1ec5fab673289da89f2c0c4b50eb8141635a9bece8d063dfd5a293 |
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