Malware Insights
The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=kakaotalk+apk+free++latest+version'. The document body, though heavily obfuscated, also contains this URL and references 'Kakaotalk apk free latest version', suggesting a lure for users to download potentially malicious software. The presence of a large number of external PDF links, many hosted on shopify.com, indicates a link farm strategy, likely to improve search engine ranking for the malicious lure. The ML classifier also strongly flagged this PDF as malicious.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 3
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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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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=kakaotalk+apk+free++latest+version
- http://files.bsmcmilehighchapter5280.com/uploads/1/3/2/7/132710797/7464994.pdf
- http://files.pickempowerment.ca/uploads/1/3/0/7/130775126/93d72ad1dd4d2b7.pdf
- https://cdn.shopify.com/s/files/1/0428/9282/0643/files/ets_gre_book.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89186344985.pdf
- https://cdn.shopify.com/s/files/1/0429/6150/2374/files/xenoreguluma.pdf
- https://cdn.shopify.com/s/files/1/0432/3039/6574/files/xosodisuzibu.pdf
- http://files.szhao.people.ua.edu/uploads/1/3/1/4/131407110/4239419.pdf
- https://cdn.shopify.com/s/files/1/0430/0609/9605/files/93395794578.pdf
- https://cdn.shopify.com/s/files/1/0432/7417/4622/files/xonilosofoxamekubolalom.pdf
- https://cdn.shopify.com/s/files/1/0431/0512/4516/files/10473407175.pdf
- https://cdn.shopify.com/s/files/1/0436/8665/8213/files/16956132743.pdf
- https://cdn.shopify.com/s/files/1/0438/4758/1856/files/abrao_de_pai_joo_pdf_download.pdf
- https://cdn.shopify.com/s/files/1/0428/9105/1161/files/ganapati_atharvashirsha_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0430/0426/4602/files/terok.pdf
- https://cdn.shopify.com/s/files/1/0434/4053/7750/files/airspeed_velocity_of_an_unladen_swallow.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lamafavikunidamekisuf.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_off0000616a.bin52235894f817176dbd23463e297fd0f682dafb24b1b5a4e093c613450e41ed04 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x616A | 4988 bytes |
font_01_sfnt_off00007279.bin2864a00934c0c99333a268693ad86dec498e4ec4b187d3d98ce9bab47ed639be |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7279 | 12300 bytes |
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