MALICIOUS
214
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
T1059.001 PowerShell
The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Knock on door sound' and the malicious URL, suggesting a lure. The presence of numerous external PDF links also indicates a link farm, likely for SEO poisoning or to distribute malicious content. The heuristic 'SE_CALLBACK_LURE' further supports a phishing or scam pretext.
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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
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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.com/pify?keyword=knock+on+door+sound In PDF document text
- http://files.schnepfsveggiedrivethru.com/uploads/1/3/2/6/132682899/5d89d46.pdfIn PDF document text
- http://files.cjphu.com/uploads/1/3/1/4/131410736/norokesov_zuvaxunitolinab_merak_nutawumekaso.pdfIn PDF document text
- http://files.hopelutheranwarren.com/uploads/1/3/1/4/131482864/3547959.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/1/0434/8300/5078/files/remaxuziguzipimizemaguw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5276/0224/files/sozopozijosupoxilidonuvu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4610/9341/files/momadijewotas.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/7649/9096/files/xirumupexexatadizora.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/8863/4263/files/dogakokujemotuduboseru.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3937/5012/files/35500306284.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/0044/7655/files/78461202892.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6142/7867/files/moxonomubelizanawi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8181/7495/files/76323890808.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5525/9560/files/44111231728.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00004755.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x4755 | 4724 bytes |
SHA-256: 225038e5fb74cfcbf8818ecd1bc52ce81d4f2aec8a20cf87dedd2fa34f1e3bba |
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font_01_sfnt_off00005777.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5777 | 10440 bytes |
SHA-256: d7cc26c3d2c1b12acb90a9e2209dc2301bd0f076c5f9893e58f13833353acf78 |
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font_02_sfnt_off00007b1f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7B1F | 16272 bytes |
SHA-256: 4a1da061204ffeacf37fc13f7d5dbd4ebbee4cb191ea8a5d14a92661125848e7 |
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