MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is further disguised by a keyword-rich URL. The document body, though heavily obfuscated, contains the same URL and references to 'circuitos electricos mallas ejercicios resueltos pdf', suggesting a lure for users searching for technical documents. The presence of a link farm heuristic reinforces the malicious intent of distributing links to potentially harmful content.
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=circuitos+electricos+mallas+ejercicios+resueltos+pdf In PDF document text
- http://files.mollylizzio.com/uploads/1/3/2/6/132682070/1003724.pdfIn PDF document text
- http://zonabujit.ericamaesincee.com/uploads/1/3/0/9/130968996/pedamibodasad-vaxuralodokuwav-revinitosurugo-jalipotova.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0432/3147/7922/files/kolirox.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5653/7505/files/mega_man_x2_rom.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8362/8708/files/sabunazununupifogeb.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9029/7507/files/19089564428.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/8831/2488/files/45374414570.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8407/0558/files/factor_polynomials_worksheet_kuta.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/7188/7767/files/durga_saptashati_lyrics.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0489/5143/files/cloud_computing_infrastructure_as_a_service.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/5064/5157/files/4_congruence_and_similarity_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/3236/3676/files/89060203492.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3123/1638/files/kuvemesebinesegata.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000654d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x654D | 5176 bytes |
SHA-256: 397a433f69c8b621dd943b630626b4e7d1d1ecca37ac5843ef88bce3ae3ee314 |
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font_01_sfnt_off000076ee.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x76EE | 11464 bytes |
SHA-256: aa54596be7b250ba03e3f263c9c9b0db1c1c87d4b212fb720a8020db21d2d690 |
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font_02_sfnt_off00009c2a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9C2A | 4324 bytes |
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f |
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