MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One of the primary links, 'https://ttraff.ru/wb?keyword=hsk%20level%201%20exam%20pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'hsk level 1 exam pdf', suggesting a lure to entice users to click on the malicious links.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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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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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=hsk%20level%201%20exam%20pdf
- http://files.villaamizade.com/uploads/1/3/1/1/131164016/7784208.pdf
- http://files.mx.cbisociety.org/uploads/1/3/0/7/130776055/d4666a.pdf
- http://vudubuw.ryandawalt.com/uploads/1/3/1/6/131606577/fananexinagomis-levejovaf.pdf
- https://cdn.shopify.com/s/files/1/0431/2681/6932/files/waxojijosirupe.pdf
- https://cdn.shopify.com/s/files/1/0447/4827/5863/files/cement_forming_boards.pdf
- https://cdn.shopify.com/s/files/1/0435/7577/1304/files/fojopisovimeworefagu.pdf
- https://cdn.shopify.com/s/files/1/0428/5346/6271/files/nonemotere.pdf
- https://cdn.shopify.com/s/files/1/0431/2743/9526/files/lomiduzabi.pdf
- https://cdn.shopify.com/s/files/1/0433/3276/3801/files/26406681522.pdf
- https://cdn.shopify.com/s/files/1/0435/6007/5427/files/12065476733.pdf
- https://cdn.shopify.com/s/files/1/0432/5956/0086/files/16527052713.pdf
- https://cdn.shopify.com/s/files/1/0434/4535/4658/files/writing_academic_english_pearson_longman.pdf
- https://cdn.shopify.com/s/files/1/0428/8220/3801/files/bass_guitar_scales_for_beginners.pdf
- https://cdn.shopify.com/s/files/1/0432/5192/5155/files/kolemo.pdf
- https://cdn.shopify.com/s/files/1/0433/1054/7099/files/31152441036.pdf
- https://cdn.shopify.com/s/files/1/0439/8622/3262/files/durijasawovefuwi.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005ee0.bin80fdf98e192b3b5d9d25c587197b8232d5e8b5d79730327e4bef29ede04af06b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5EE0 | 5296 bytes |
font_01_sfnt_off000070e5.bine59a91fc0547fddd12b8a5ec2836b35eeb1ee36573a47969e647a9503732151b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x70E5 | 10432 bytes |
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