MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a link farm designed to appear as search results for a specific document, ultimately redirecting to a malicious URL. The primary malicious indicator is the PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing on 'https://ttraff.ru/pify?keyword=usabo+open+exam+2016+pdf'. This suggests the document's purpose is to drive traffic to malicious infrastructure, likely for further exploitation or phishing. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification.
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.ru/pify?keyword=usabo+open+exam+2016+pdf In PDF document text
- http://files.kim-russell.co.uk/uploads/1/3/1/3/131379406/3618390.pdfIn PDF document text
- http://files.xnews.blog/uploads/1/3/1/4/131437930/5553441.pdfIn PDF document text
- http://povewog.geriatricpsychiatryresearch.org/uploads/1/3/0/8/130814921/1397644.pdfIn PDF document text
- http://files.mashath.net/uploads/1/3/0/9/130969548/zurus.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/1/0429/6150/2374/files/sumizugesimofafabewutinij.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/3676/0485/files/36038645365.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0532/1109/files/vozowilorat.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3329/6028/files/2016_toyota_camry_se_owners_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/2750/4024/files/judik.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/6913/6280/files/cipher_build_pillars_of_eternity.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4556/0225/files/pexun.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7320/7446/files/2015_donation_value_guide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/9143/5422/files/sujuda.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0652/4566/files/94789811530.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/5131/0488/files/futon_bunk_bed_big_lots.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/8981/3909/files/58697937988.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/3384/5150/files/51760852888.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_off0000599b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x599B | 5400 bytes |
SHA-256: f59494a053f09f9a4dda8b22619074456e583328b540aacfa847cc77c5fa9dd0 |
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font_01_sfnt_off00006bd3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6BD3 | 10144 bytes |
SHA-256: 84e4d8ac45ef18ace39fe853590596ed4bc4ef11485d688358bfa8cc7206ca34 |
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font_02_sfnt_off00008e7e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8E7E | 4324 bytes |
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34 |
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