MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, many of which point to what appears to be a link farm designed to improve SEO rankings. One of the primary links redirects to a known malicious domain, ttraff.ru, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to 'rational expressions pdf', likely a lure to attract users searching for educational materials. The ML classifier strongly flagged this PDF as malicious.
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/pify?keyword=addition+and+subtraction+of+rational+expressions+pdf
- http://files.gibtech.net/uploads/1/3/0/9/130969761/8a239732eebb718.pdf
- http://files.rvtkd.com/uploads/1/3/2/3/132303351/jupulepazi.pdf
- http://xubuk.southribble-greatwar.com/uploads/1/3/0/8/130874254/d4e9e3e25.pdf
- https://cdn.shopify.com/s/files/1/0434/6799/7344/files/biltong_box_plans.pdf
- https://cdn.shopify.com/s/files/1/0432/6427/8686/files/lowes_credit_card_services.pdf
- https://cdn.shopify.com/s/files/1/0432/6660/5211/files/xomedutinolupefizif.pdf
- https://cdn.shopify.com/s/files/1/0432/0401/8336/files/dunubutifofufulujere.pdf
- https://cdn.shopify.com/s/files/1/0430/5797/1362/files/76323180957.pdf
- https://cdn.shopify.com/s/files/1/0428/9003/5366/files/55998782568.pdf
- https://cdn.shopify.com/s/files/1/0433/3237/0584/files/52360885263.pdf
- https://cdn.shopify.com/s/files/1/0427/7361/0663/files/84210155802.pdf
- https://cdn.shopify.com/s/files/1/0438/4381/3538/files/72043971966.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
- https://cdn.shopify.com/s/files/1/0429/9656/4131/files/pegedibi.pdf
- https://cdn.shopify.com/s/files/1/0431/6083/0111/files/xuzajidunadubiwaxefiru.pdf
- https://cdn.shopify.com/s/files/1/0436/4291/2926/files/dulujumomitabekobotera.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_off000070d7.bina3df73fa2063592a8a70d73b0946e9da9d3bb0df245aba15eef42380745f4845 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x70D7 | 5348 bytes |
font_01_sfnt_off00008318.bin828a916fff96c331a14706ab2dde9d5eda97281d14cec255260c9d31458d6cf6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8318 | 12288 bytes |
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