MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, with cdn.shopify.com being a dominant host. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, https://ttraff.com/pify?keyword=binomial+coefficient+identities+pdf, is the primary indicator of malicious redirection.
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.com/pify?keyword=binomial+coefficient+identities+pdf In PDF document text
- http://files.aprildavisfineart.com/uploads/1/3/1/3/131378975/040ae9adeebbb0.pdfIn PDF document text
- http://files.khang-le.com/uploads/1/3/2/6/132683252/kigutofi.pdfIn PDF document text
- http://files.dieseldoll.net/uploads/1/3/0/8/130814676/3878695.pdfIn PDF document text
- http://files.midmichiganstays.com/uploads/1/3/0/7/130739596/bivurivomepen-sudipefuxawun.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/1/0433/2997/8526/files/vugexowa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9993/9235/files/devunosipus.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/3598/9915/files/munoxaw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7327/2992/files/18642530063.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/9100/0472/files/u_tube_video_of_economy_tractor.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73875000904.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4697/7179/files/24438619160.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6230/5702/files/nomozebovawawuzasilorafij.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/2151/6449/files/siratupeda.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4277/4938/files/exercices_corrigs_automatisme_industriel.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00013301.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13301 | 5256 bytes |
SHA-256: 8deffb3a673d1209bd96d9eb36395534c7c8a7eec83e3c0b0cb67a6476a5a662 |
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font_01_sfnt_off000144c6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x144C6 | 17860 bytes |
SHA-256: 173d9ec810e05f7588e6cdba63f83a9c46d305567d7cff8d8a3e27e609d78a32 |
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font_02_sfnt_off00017cb4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x17CB4 | 17336 bytes |
SHA-256: ff4e42278974b1ba87f55d5a65275fdbbc967ba7318b55338de0f6e782d79a83 |
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