MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'biochemical engineering lecture notes pdf' and a URL that matches the malicious redirector. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document, likely intended to lead users to a phishing or malware distribution site.
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.cc/pify?keyword=biochemical+engineering+lecture+notes+pdf In PDF document text
- http://files.bettinakoch.net/uploads/1/3/1/0/131070476/3277690.pdfIn PDF document text
- http://files.key2evolve.com/uploads/1/3/0/8/130874318/zasabuxemer_xawapikiguromik_balasoge.pdfIn PDF document text
- http://files.sonserae.com/uploads/1/3/2/7/132712323/b2ab5.pdfIn PDF document text
- http://files.mcfeesilversmith.com/uploads/1/3/1/4/131438891/kujuxuzajusel.pdfIn PDF document text
- http://mifunaki.paulnieman.uk/uploads/1/3/1/1/131163599/putasode-maxoxemibula-tomijowa-zedupew.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/1/0435/8694/5187/files/65902812684.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/0862/9659/files/janome_service_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2885/6477/files/89168634908.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/0645/2131/files/azusa_street_book.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7632/1434/files/qubool_hai_written_updates.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/1903/5033/files/48138977247.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0515/7284/files/13414678608.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2225/3208/files/tupagazutovunip.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/1671/6437/files/94714079886.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0154/3831/files/mewifemaropusizufudo.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_off000060f3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x60F3 | 5616 bytes |
SHA-256: b20b441344af7d1e3e7f191a249da840fcd9de5a0622af53258bf851f54a7a9a |
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font_01_sfnt_off000073d5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x73D5 | 2116 bytes |
SHA-256: 49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640 |
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font_02_sfnt_off00007da0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7DA0 | 11732 bytes |
SHA-256: 6b0b2fdcf5db91d6526c37e5b168b29192554b0a7cb93f129f61063e3acac563 |
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