MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on cdn.shopify.com but lead to external PDFs. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=template+acceptance+letter+for+internship, suggesting a lure related to an internship acceptance letter. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack.
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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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=template+acceptance+letter+for+internship In PDF document text
- http://zejil.kschnallart.com/uploads/1/3/2/3/132303354/tezokam-fegavepixupad.pdfIn PDF document text
- http://files.redsledornaments.com/uploads/1/3/1/3/131383247/6113848.pdfIn PDF document text
- http://files.falconhillbz.com/uploads/1/3/1/3/131384300/kawemuvebupozazaj.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/1/0431/9143/5422/files/27200448035.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0820/4701/files/25631444475.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9679/3503/files/tibufuda.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/6209/9097/files/varovolugezemugepawoje.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0446/2074/2819/files/bixajex.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0454/2945/7064/files/sheet_metal_gusset_design_guidelines.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8530/7808/files/96933465119.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9378/6791/files/list_of_ethical_principles.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0461/5156/5475/files/windows_10_version_1803_stuck.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/1570/8577/files/commercial_offer_template_free.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2621/8134/files/boziruj.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_off000067c2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x67C2 | 4992 bytes |
SHA-256: 4c2add23bf81031df9354faeae7228a2746f845095d93c7c676ef83992e16f10 |
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font_01_sfnt_off0000787a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x787A | 10080 bytes |
SHA-256: 975196608430909ba6e321cfeb533d06eeccc15406e1a6952f914eac2f953b73 |
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font_02_sfnt_off00009b04.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9B04 | 4324 bytes |
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333 |
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