MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to a known malicious redirector. Another critical heuristic, PDF_SEO_LINK_FARM, highlights the presence of a large number of external PDF links, suggesting a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated, but the presence of the wkhtmltopdf application name and a date suggests it was generated programmatically.
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/wb?keyword=books%20about%20meditation%20pdf In PDF document text
- http://files.melrockworld.com/uploads/1/3/1/4/131406934/31cf418.pdfIn PDF document text
- http://files.sewsewquilt.com/uploads/1/3/1/3/131380045/ee664f.pdfIn PDF document text
- http://files.professorjavas.us/uploads/1/3/2/7/132710630/jagosuroguxid_borapovukuverep.pdfIn PDF document text
- http://files.stamellstring.com/uploads/1/3/0/9/130969984/4003678.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/1/0429/1756/0473/files/kujuved.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/9477/8791/files/54811910508.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6623/7852/files/32994925778.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdfIn PDF document text
- https://xexusugemavu.files.wordpress.com/2020/07/netejisabovukiz.pdfIn PDF document text
- https://jidematapaf.files.wordpress.com/2020/06/84281630449.pdfIn PDF document text
- https://vipikewef.files.wordpress.com/2020/06/75057203426.pdfIn PDF document text
- https://kugigoke149047822.files.wordpress.com/2020/06/gewujoxifuvepit.pdfIn PDF document text
- https://nuxezobexet.files.wordpress.com/2020/07/90340095738.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/3015/1330/files/lamere.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pitoparejiki.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8772/4704/files/naxopi.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_off0000dddc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDDDC | 5192 bytes |
SHA-256: 0556bc4fabf390f90b49f5573ce4626ecb75089dd35976dc2897d99ae1c203a7 |
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font_01_sfnt_off0000ef75.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEF75 | 10920 bytes |
SHA-256: 2e4a91b7d5801f3aa2095989afa0c83c4c97aa28c68c15619bd3792f2e483bd7 |
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