MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=korean+grammar+worksheets', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Korean grammar worksheets', suggesting a lure to disguise the malicious intent. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
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=korean+grammar+worksheets In PDF document text
- http://files.cromsphotography.com/uploads/1/3/0/7/130776204/9e3f323a2e8.pdfIn PDF document text
- http://files.daybreakersolutions.com/uploads/1/3/0/7/130775987/addba17.pdfIn PDF document text
- http://vuxel.saladbowlproject.org/uploads/1/3/1/3/131380213/jepogug_ruwazomorodavo_lufinefop_rajabu.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/1/0433/0009/4112/files/navy_blue_jackets_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6820/3942/files/fuvawudodukivelonaza.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/4728/1062/files/body_movement_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/1202/1662/files/1528900904.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/1755/2543/files/71892844731.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/1242/1789/files/potoxag.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6633/6167/files/bolopezelowiposobewepuk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/6687/4266/files/vovukutizutim.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/6294/2106/files/archeage_darkrunner_guide.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 5
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005da9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5DA9 | 8028 bytes |
SHA-256: 98b13b3c25ccecd029ebb4aeef88b4d518ee784b1cf1ba092700ccb7d4c74945 |
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font_01_sfnt_off000076f2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x76F2 | 5192 bytes |
SHA-256: 9d3a43d07385860d08a2df93289cdde52b110064e3b3dafa2376aad8b3cf8a4b |
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font_02_sfnt_off0000887b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x887B | 1800 bytes |
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620 |
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font_03_sfnt_off00009107.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9107 | 9800 bytes |
SHA-256: ddf2ec09c613d7f73e485761e30410b152deba61789d6a037e8642032336f9c1 |
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font_04_sfnt_off0000b2d2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB2D2 | 16312 bytes |
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b |
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