MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Grammar for English Language Teachers 2020 PDF', likely intended to trick users into clicking the malicious link. The presence of multiple Shopify-hosted PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.
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=grammar+for+english+language+teachers+2020+pdf In PDF document text
- http://files.thutupallilab.com/uploads/1/3/0/7/130739169/6eac41cf04429f6.pdfIn PDF document text
- http://files.hillcrestsdachurch.co.nz/uploads/1/3/0/7/130739298/2753048.pdfIn PDF document text
- http://files.midwestmozart.org/uploads/1/3/1/4/131406892/zotom-lufikogefa-dadulan.pdfIn PDF document text
- http://files.efabps-opportunitygaps.org/uploads/1/3/2/6/132682882/3917729.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/1/0432/6404/9318/files/caesar_cipher_in_cryptography.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6292/7253/files/mowepedimenozatikilonu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7045/5965/files/13852583075.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/2051/7537/files/sop_abortus_imminens.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5567/6568/files/40705164082.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8851/9080/files/45869709466.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7301/0845/files/sujedijimadobomimoxexi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9363/8816/files/vozokinejamuvolamituw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/1243/1776/files/describe_people_s_appearance_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6968/5414/files/forest_biometric.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/5930/5880/files/fundamentals_of_analytical_chemistry_8th_edition.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005668.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5668 | 5756 bytes |
SHA-256: 4825f22c6c7c8d7d18730fc09071dd99c14d68fe9e3ca74a51950ee7d8be13b8 |
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font_01_sfnt_off000069d4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x69D4 | 9852 bytes |
SHA-256: cb4d29c162e42f132b4e9a75b5a2c0fceee288663defe1a6a8ef9896346447dd |
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font_02_sfnt_off00008b75.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8B75 | 4324 bytes |
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3 |
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