MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains embedded links that point to a known malicious redirector, disguised as a solution manual for a calculus textbook. The ML classifier strongly indicates maliciousness, and the presence of numerous SEO-optimized links suggests a campaign to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.
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=calculus+10th+edition+solution+manual+pdf In PDF document text
- http://files.evelyngamacounseling.com/uploads/1/3/2/6/132683000/5166439.pdfIn PDF document text
- http://files.thickandthintheatreproductions.com/uploads/1/3/0/9/130969300/suzaxipod.pdfIn PDF document text
- http://files.nicoledietze.com/uploads/1/3/0/7/130775557/9625904.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/1/0428/6903/1078/files/nagisusoxa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/2816/9375/files/damopubalinumipi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65817182127.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0632/7959/files/rexiwefusese.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/2182/0313/files/52083361867.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9623/6447/files/64647361000.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2004/1886/files/47488330527.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4697/7179/files/depome.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8875/6384/files/25690997281.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7056/3239/files/firokepazasuguxomed.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8004/8023/files/wunukizererovejizoseporom.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00009e9b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9E9B | 5400 bytes |
SHA-256: 59d8cdadf85cd8a86e6487f66a9925b210a56fd0ce165d7977e1b90e51a07393 |
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font_01_sfnt_off0000b0c8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB0C8 | 2184 bytes |
SHA-256: 64572888870b9d82432154edb418e41c8e881f1d92178375a4b46fdd5f84da48 |
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font_02_sfnt_off0000ba2a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBA2A | 13952 bytes |
SHA-256: 9b9963bc00283e3c061cc354bcb24ab0ee106c5eb38b9dd6879cfec35e82de13 |
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font_03_sfnt_off0000e749.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE749 | 16140 bytes |
SHA-256: 5ef06bea0ce643391bea47400be2c481bde3ccceb1c2ec004e90928b1c9d5345 |
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