MALICIOUS
254
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains a link to a known malicious redirector, ttraff.ru, which is associated with a callback phishing or tech-support scam. The document body, though partially garbled, contains text related to 'Skylight bank number' and includes numerous embedded URLs, many pointing to static.usrfiles.com, suggesting a link farm designed to obscure the ultimate destination. The presence of these elements strongly indicates a social engineering attack aimed at tricking the user into visiting a malicious site.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 7
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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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Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISHDocument impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://ttraff.ru/wix?keyword=skylight+bank+number.
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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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/wix?keyword=skylight+bank+number In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_915199595cb647fd8b5674d56b072ac8.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_2c098c1abc0841e68681a2d5887ad883.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_01bf716fa43747cb81617682ec72c318.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_2ae0dcf5291a4fcabc2834b713c7466a.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_a97515deabf44a8f893645208f2536d5.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_4044c70bd1634e7f91176e2bca3425b4.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_731e1b0d333c4dd38ec2276b9facd019.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_e8a7595f5f2a47f0b8b9fe17c4e4072b.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_8e4535b03d7846478409bbabe49bafdb.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_4fe9ca3e4ebf4cb6be6b9aff8f9824a2.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_d92ad30fac2644a2bd6569eb96969c32.pdfIn PDF document text
- https://static.usrfiles.com/ugd/b8c837_da184cc2007d4a55b383342e8a576f75.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_off00004d67.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x4D67 | 5328 bytes |
SHA-256: dd1c8072dad4e2980ca7b5eec9d7b90da6d7930208c50753d8edd0f2258c2c48 |
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font_01_sfnt_off00005f61.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5F61 | 10280 bytes |
SHA-256: 837693fab02eb560bba4da35e033764df67ebeda81134aa885010149df41d83d |
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