MALICIOUS
234
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
T1059.001 PowerShell
The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=devlin+textbook+biochemistry+pdf', which is a known malicious redirector. Another embedded URL points to 'https://cdn.shopify.com/s/files/1/0432/4337/2699/files/teamviewer_quicksupport_mac.pdf', suggesting a lure for remote support tools. The combination of these elements indicates a social engineering attack aiming to trick the user into downloading potentially malicious software.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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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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Remote-support tool lure high SE_REMOTE_SUPPORT_LUREDocument instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
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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=devlin+textbook+biochemistry+pdf In PDF document text
- http://files.hotdoghols.co.uk/uploads/1/3/1/6/131637043/707450.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0432/4337/2699/files/teamviewer_quicksupport_mac.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/6773/4171/files/ssa-_3368-_bk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8671/6830/files/anatomy_of_human_bones.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8307/9592/files/binary_tree_zigzag_level_order_traversal.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0206/8131/files/56285254582.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6980/8548/files/40685070435.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/5589/6990/files/zetuvejagesuzewupirer.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2502/2621/files/brochure_tri_fold_template_free.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7743/4525/files/19182854792.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/0910/6335/files/munofesepuvitixa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3993/9994/files/classification_of_matter_note_taking_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0140/4830/files/sotewagavij.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9821/0461/files/agile_agile_project_management_kanban_scrum_kaizen.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_off00008d52.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8D52 | 5408 bytes |
SHA-256: e97fadabfd6b5b0680cde9a8dfcb408660e5d7bee34605106a2c91c6672b4280 |
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font_01_sfnt_off00009f95.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9F95 | 10076 bytes |
SHA-256: 352b42e5414165801548a2d06c874ecb86e68adcb5ce35511484566fe62b5753 |
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font_02_sfnt_off0000c241.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC241 | 16112 bytes |
SHA-256: 04c641d0aedeaa8c494855f42a2e9ae6fad9e3679126e7dc5c08fccc4b41c292 |
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font_03_sfnt_off0000d711.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD711 | 4324 bytes |
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e |
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