MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO link farming or to obscure malicious redirects. One of the embedded URLs, https://ttraff.ru/wb?keyword=introduction%20to%20basic%20mathematics%20pdf, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness.
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=introduction%20to%20basic%20mathematics%20pdf
- http://files.weddinglocationsorlando.com/uploads/1/3/1/3/131397946/tarefu.pdf
- http://files.bhsvikingtheatre.com/uploads/1/3/1/4/131408100/5059474.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/2253/3276/files/lawokufu.pdf
- https://cdn.shopify.com/s/files/1/0431/8281/7441/files/ncert_english_literature_reader_book_for_class_10.pdf
- https://cdn.shopify.com/s/files/1/0435/4460/8932/files/tepaxiwap.pdf
- https://cdn.shopify.com/s/files/1/0432/0644/3163/files/32243429912.pdf
- https://cdn.shopify.com/s/files/1/0429/7841/0655/files/22855224106.pdf
- https://cdn.shopify.com/s/files/1/0428/9573/6988/files/bukuwafesejefikowadi.pdf
- https://cdn.shopify.com/s/files/1/0431/6839/9524/files/87679971458.pdf
- https://cdn.shopify.com/s/files/1/0433/4200/4375/files/lbdfx_fund_fact_sheet.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
- https://cdn.shopify.com/s/files/1/0434/1995/9463/files/alcohol_abuse_among_youth.pdf
- https://cdn.shopify.com/s/files/1/0433/4184/0552/files/byte_array_to_string_golang.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/
- http://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000474c.bina8f7b311e8771aa5c6608ce21878065cdcc398ebab30bfaaaa8545e7e57cccfa |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x474C | 5440 bytes |
font_01_sfnt_off00005993.bin2ec629cb1a688344866c1dd522d2bc7338d981ba00a33ee417daba552186e279 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5993 | 9468 bytes |
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