MALICIOUS
214
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains embedded JavaScript and multiple links, including one pointing to a known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains the string 'biochips pdf free download' and the malicious URL, suggesting a lure for users to download further content. The presence of a link farm further supports the SEO-based distribution tactic.
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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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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Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTHA PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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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=biochips+pdf+free+download In PDF document text
- http://powowukor.zionweekdayministries.com/uploads/1/3/1/3/131384709/vobosa.pdfIn PDF document text
- http://files.wichitasouth77.com/uploads/1/3/0/8/130815277/6768741.pdfIn PDF document text
- http://files.donalcox.com/uploads/1/3/0/8/130814769/8047314.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/1/0431/5496/4631/files/nifokujosiwufupopexaluj.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5382/5704/files/allotment_of_share_ppt.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8047/4014/files/bojudiwozawedirisujakev.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8837/0077/files/6867548534.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/0485/4426/files/94910767590.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4890/2556/files/tatuxupubabun.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/6503/1321/files/gijelulexizuwe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3900/6615/files/neonatal_advanced_life_support_2020.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9313/1425/files/48301366333.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8227/6257/files/fovinum.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/5107/4214/files/gta_san_andreas_cheat_codes_pc_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5486/6333/files/wawelovolexizafivejavof.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/1642/1529/files/unfinished_gun_gungeon.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000a8a0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA8A0 | 4264 bytes |
SHA-256: 2000921d9eec7a3d1a591bd6a3739a592da88ea208795d1b35b8ef82d217915f |
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font_01_sfnt_off0000b7a9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB7A9 | 5384 bytes |
SHA-256: 25716bb219689d61967fcc47e081419e7dc582554077a60e2a5ee3f46447b6ba |
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font_02_sfnt_off0000c9fd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC9FD | 27960 bytes |
SHA-256: 077fa3eeac9e47c1a57894b0b307098d94b0b943d1ca89625c8f6fb430029592 |
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font_03_sfnt_off0001199e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1199E | 16100 bytes |
SHA-256: d98a9309e076b13835c6659d635ae6c9662cc733e578b44ec6f104cfef2f50ae |
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