MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 User Execution: Malicious File
The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains keywords related to 'Kalimba music book pdf', suggesting a lure to attract users. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content.
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.ru/pify?keyword=kalimba+music+book+pdf In PDF document text
- http://files.kissfitnessprogram.com/uploads/1/3/1/3/131379042/xepawusaruzoseso.pdfIn PDF document text
- http://files.thegreenmedicineshop.com/uploads/1/3/1/4/131454297/99eac.pdfIn PDF document text
- http://files.neuropsyfi.com/uploads/1/3/1/4/131453595/255936.pdfIn PDF document text
- http://files.complexclear.com/uploads/1/3/1/4/131482926/908623.pdfIn PDF document text
- http://files.sino-oilfiltration.com/uploads/1/3/0/7/130740073/zogafomuxixi.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/1/0431/7731/2405/files/libimurirajavuvujefad.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/5660/4070/files/mukimubadatujujatakufi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6843/2288/files/remuletovateropelilegaxit.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0474/7168/files/vuvekad.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/1403/7409/files/22326156325.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9752/2329/files/17728968936.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/1123/4197/files/ramujepidijofefuwebejoxuz.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/5692/9687/files/faxizesetejobomega.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/5942/0063/files/vupululomujikuna.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83759083977.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/3459/1907/files/3490560520.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/3029/9292/files/zawekerezoxizuxofili.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/2630/7480/files/12989827776.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_off00009aa1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9AA1 | 4956 bytes |
SHA-256: dafc704e3d477c4378058ae4d2a2a99a492e8c9cbfe8225395ce42209e967383 |
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font_01_sfnt_off0000ab71.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAB71 | 10256 bytes |
SHA-256: 0f98c9f2dcd21e5bce81d057be3458092f7596d54f36f81115037b7796e4c364 |
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