MALICIOUS
214
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=checksur.+exe+tool'. This redirector is likely used to deliver a malicious executable disguised as a 'checksur.exe tool'. The presence of numerous PDF links and the ML classifier's high confidence score further support the malicious nature of this document, suggesting it's part of a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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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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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.com/pify?keyword=checksur.+exe+tool In PDF document text
- http://files.spiritbearservices.com/uploads/1/3/0/7/130775588/gokawurosezit_sinawuwuvefur_podivi_damabukexate.pdfIn PDF document text
- http://files.18q-adifferentkindofnormal.com/uploads/1/3/1/6/131606605/7703659.pdfIn PDF document text
- http://nazijolu.nicolettabuildingcontractors.com/uploads/1/3/0/8/130814328/ronovurevibemor.pdfIn PDF document text
- http://vixevol.kiriiku.com/uploads/1/3/1/6/131606349/zovotutoxogugux.pdfIn PDF document text
- http://files.hhnailstrips.com/uploads/1/3/1/6/131606262/9613797.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0430/3729/4741/files/rasevajitaxeku.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/0349/3026/files/6488052739.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/0300/9430/files/cad_soft_tools_dwg.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/0005/3408/files/zisinorumel.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3459/0875/files/sebixojedinobivewilif.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0926/9156/files/android_delete_google_account_from_phone.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6273/8592/files/list_of_bacterial_diseases_in_plants.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5276/9192/files/39556871000.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/5827/5238/files/56912938362.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0451/7848/6933/files/jogovuporuteve.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/5720/8731/files/69486413348.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000068bd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x68BD | 4592 bytes |
SHA-256: 818c986ae0a48b5a8d09dbad607313687cfc4f60b743192b7384f77a81bbed58 |
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font_01_sfnt_off0000787b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x787B | 10416 bytes |
SHA-256: 1c610b27eb59767544bf1ea95fc60691fdea0da79960a542f5ba40b023dca88d |
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font_02_sfnt_off00009c1e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9C1E | 4324 bytes |
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176 |
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