MALICIOUS
194
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 domains commonly used in SEO link farms. One of these links, https://ttraff.ru/pify?keyword=protein+structure+primary+secondary+tertiary+and+quaternary+pdf, is identified as a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body itself is heavily obfuscated but contains references to the malicious URL and other PDF links.
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=protein+structure+primary+secondary+tertiary+and+quaternary+pdf In PDF document text
- http://files.socialtheorywatch.org/uploads/1/3/1/6/131606248/1003437.pdfIn PDF document text
- http://files.familylavisse.com/uploads/1/3/0/7/130776451/gutapemaroz.pdfIn PDF document text
- http://files.countyparkfriends.org/uploads/1/3/0/8/130814279/zobisulit_selitiga_sojinotavom.pdfIn PDF document text
- http://files.trattoria89.com/uploads/1/3/1/3/131379085/1387542.pdfIn PDF document text
- http://files.benbrixey.com/uploads/1/3/0/7/130739686/metezo_ruwubebupiv_nofajosumino_paxilire.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/1/0432/1820/6887/files/vibadijezejudajori.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/temufaxilagig.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0449/9347/8814/files/qasida_burda_arabic.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/0177/2192/files/terraria_black_lens.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9092/8026/files/rudevanenegobukojinuv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2064/7576/files/tigutol.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5663/5812/files/vomowu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4869/6993/files/it_wasnt_me_lyrics.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/7955/7539/files/74225474364.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/4693/5451/files/atal_pension_yojana_details_in_marathi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/0883/5236/files/zifuxigikeretigo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3192/8730/files/zedakulorobowenubaj.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/7276/6630/files/fuvosowezavakokanazij.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_off00006d74.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6D74 | 5500 bytes |
SHA-256: 48195b582363228fb9e1a908932d80969283a99b89d1127b0bb8a61f9ced4264 |
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font_01_sfnt_off0000801c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x801C | 9728 bytes |
SHA-256: e693361e4c622a67a4b8613e8fe5f2f3692c7d92c95cf7e18a0a2ad148f1f54d |
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