MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. The document body text, though partially corrupted, includes a reference to 'mlsu private exam form date 2019', suggesting a lure for phishing or credential harvesting. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination. The ML classifier strongly flagged this PDF as malicious.
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=mlsu+private+exam+form+date+2019 In PDF document text
- http://files.dressagestars.com/uploads/1/3/0/9/130969472/f15daf.pdfIn PDF document text
- http://fedorahosted.org/lohitIn 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/1/0432/0709/8529/files/assembler_plusieurs_avec_foxit.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4556/0219/files/zuvagopesomozaniravad.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2243/3953/files/53678375229.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4535/5682/files/pulses_images_to.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/6123/8168/files/nombre_rationnel_et_irrationnel_exercice.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4842/6920/files/ginusuxumiv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/2825/0781/files/jowunelazijafijaniw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9961/9492/files/migiw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/9501/4056/files/77502543533.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0501/7255/files/28413501983.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4888/5662/files/66821921109.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5575/9011/files/gawulamajujemu.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_006_off0000bd9f.bin |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0xBD9F | 11296 bytes |
SHA-256: 749652baf53f8bfec29b16d2bee8888b63bde63282df6f542274062a929171d2 |
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font_00_sfnt_off00006edd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6EDD | 5804 bytes |
SHA-256: 1aa9b76e42fdcdaefc67c858404bf0dd4022e999aff558fc1eb5f35b5587b0ea |
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font_01_sfnt_off0000829d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x829D | 3720 bytes |
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281 |
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font_02_sfnt_off00008e01.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8E01 | 15228 bytes |
SHA-256: 0ca709645dfdad83798b63dd86c9bc9cdb59a340c98fe385af40b519fb41fe1f |
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