MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is associated with SEO link farms. This suggests a phishing or scam attempt, likely using the guise of academic resources to trick users into clicking malicious links. The ML classifier also 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=bibliography+latex+pdflatex In PDF document text
- http://files.remotesensinglab.org/uploads/1/3/1/4/131437778/7211003.pdfIn PDF document text
- http://files.klacapital.com/uploads/1/3/1/4/131406173/d75f598.pdfIn PDF document text
- http://rolisul.dupagechiefs.org/uploads/1/3/0/8/130814238/penikogebiwotaraworu.pdfIn PDF document text
- http://files.purejoymissions.org/uploads/1/3/0/8/130814676/3645e46c8284d.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/1/0435/9343/3246/files/maximum_number_of_overlapping_intervals.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/5042/6780/files/rupewewebejibugaxuzegiluw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/6176/3480/files/salirineze.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0921/1557/files/65229761183.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/6079/6318/files/regopubogamodapisakemix.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2521/1296/files/49831352841.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/0781/9422/files/notetutus.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/4302/7106/files/45617395590.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/9776/6553/files/64691957072.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5404/7137/files/podevujafurojamituremuta.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8152/1565/files/47437997235.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/8665/2316/files/jasukezegadumugeloxofazo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3672/8726/files/zudelelowasepenujidivu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/2092/7655/files/pikewupajufekem.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/5045/8520/files/todakuzibomisexenen.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_off0000ed02.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xED02 | 5484 bytes |
SHA-256: adeb1f8738271c3d2c58a69bf3d00f4f4526e82ec0b0a888c7f20ab2be79d900 |
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font_01_sfnt_off0000ffb2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFFB2 | 15968 bytes |
SHA-256: 9fd18c84f364bee03f87126bd69367a409ea60c9a7ebda41cbcfbcdccef141c7 |
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