MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
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 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=kakaotalk+apk+free++latest+version In PDF document text
- http://files.bsmcmilehighchapter5280.com/uploads/1/3/2/7/132710797/7464994.pdfIn PDF document text
- http://files.pickempowerment.ca/uploads/1/3/0/7/130775126/93d72ad1dd4d2b7.pdfIn 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/1/0428/9282/0643/files/ets_gre_book.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89186344985.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/6150/2374/files/xenoreguluma.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3039/6574/files/xosodisuzibu.pdfIn PDF document text
- http://files.szhao.people.ua.edu/uploads/1/3/1/4/131407110/4239419.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/0609/9605/files/93395794578.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7417/4622/files/xonilosofoxamekubolalom.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0512/4516/files/10473407175.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/8665/8213/files/16956132743.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/4758/1856/files/abrao_de_pai_joo_pdf_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9105/1161/files/ganapati_atharvashirsha_lyrics.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/0426/4602/files/terok.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4053/7750/files/airspeed_velocity_of_an_unladen_swallow.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lamafavikunidamekisuf.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 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000616a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x616A | 4988 bytes |
SHA-256: 52235894f817176dbd23463e297fd0f682dafb24b1b5a4e093c613450e41ed04 |
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font_01_sfnt_off00007279.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7279 | 12300 bytes |
SHA-256: 2864a00934c0c99333a268693ad86dec498e4ec4b187d3d98ce9bab47ed639be |
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