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 PDF files hosted on various domains. One critical heuristic firing indicates that the PDF links to a known malicious redirector infrastructure. The document body itself contains obfuscated text and a URL that appears to be a lure for a PDF download, which is then redirected. This suggests a phishing or redirection attack aimed at leading the user to malicious content.
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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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=mathematical+modeling+of+physical+systems+an+introduction+pdf In PDF document text
- http://files.allfloorsinteriors.com/uploads/1/3/0/9/130969375/kexajize.pdfIn PDF document text
- http://vudajiw.searchlightforensic.com/uploads/1/3/1/4/131407406/5e1d879724f0ce9.pdfIn PDF document text
- http://nujaw.prli.us/uploads/1/3/0/7/130775795/sotuxadapilodi.pdfIn PDF document text
- http://files.savepleasantonneighborhoods.com/uploads/1/3/2/6/132695596/ratef.pdfIn PDF document text
- http://pezimemig.groundwaterscienceandsustainability.org/uploads/1/3/2/6/132682124/motenetatuwegele.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/1/0428/7230/7875/files/telisoriwus.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/5893/8531/files/au_agenda_2020.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9496/6421/files/lubikiguwu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/4089/7181/files/bowel_obstruction_in_children.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4906/6397/files/21474162848.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/7981/1750/files/61252489071.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/1883/0503/files/cetosis_en_rumiantes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4744/3865/files/opie_heart_physiology.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4184/8470/files/libake.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7753/2824/files/circuit_breaker_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/8947/5237/files/38015416.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_off000048e2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x48E2 | 5676 bytes |
SHA-256: 359a556d194ac8e36331d02366c4a6279427f7e047fb362e0e63897ea1389ca7 |
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font_01_sfnt_off00005c26.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5C26 | 8568 bytes |
SHA-256: 2f5fdcc7b9406306983f9eb7646d9f71e8d59380810bebcf529ee5e53feeab0f |
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