MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure for 'calculus 1 problems pdf'. The presence of numerous external PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. The primary malicious IOC is the redirector URL.
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=calculus+1+problems+pdf In PDF document text
- http://files.pop-wuj.org/uploads/1/3/0/8/130874284/buriraxusa_lixogej_sufenut.pdfIn PDF document text
- http://files.serviportspain.com/uploads/1/3/0/7/130776489/zonobanoputi-lasusitexez-fatubeb.pdfIn PDF document text
- http://files.carlingtonchaplaincy.com/uploads/1/3/1/6/131606121/4317344.pdfIn PDF document text
- http://files.crotonlibrary.org/uploads/1/3/1/3/131383480/sedidakavurabafi.pdfIn PDF document text
- http://files.elcazadormex.com/uploads/1/3/2/6/132683334/8515a97b2d2.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/1/0428/1437/4047/files/jukexakejag.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/9688/1814/files/tomiwafurexevu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/4168/3618/files/wodadowabepi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0009/4112/files/kupefub.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2266/3325/files/48276692534.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/4958/0704/files/fejik.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4473/2065/files/wupugofotaki.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8850/2174/files/34660991441.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/1218/5499/files/54518070188.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4923/8179/files/fisunufiwina.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9242/6405/files/minatewo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/6481/1927/files/sugalilakegumiwokifenad.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/6552/1814/files/87231446733.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/1434/9215/files/2167709993.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7812/3669/files/83905530620.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
🗂 Part of campaign:
crotonlibrary.org
3 samples
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00008b84.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8B84 | 5164 bytes |
SHA-256: d8ccb62caa89f689c2de009ac568fa676a6ae17739c8a28831e3ca0343eaac66 |
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font_01_sfnt_off00009d12.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9D12 | 9784 bytes |
SHA-256: 50d198616f852fa95fe4bfaf774a5c2c24b2b907fb180615e90d9d5ab6693b72 |
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