MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'psat practice test 1 spring 2019 answers' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be a link farm designed to redirect users to malicious infrastructure.
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=psat+practice+test+1+spring+2019+answers In PDF document text
- http://files.plant-miner.com/uploads/1/3/1/3/131379833/9735485.pdfIn PDF document text
- http://files.foe2122.com/uploads/1/3/0/7/130739718/gonoguguzedafumetopi.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/1/0429/8535/7463/files/questions_and_answers_about_vietnam_war.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/7405/2503/files/vogojenukizeriwino.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/4801/8855/files/lewis_sperry_chafer_systematic_theology.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4995/1138/files/7352221845.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/2371/8805/files/30636493569.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/6631/7205/files/calculus_1_exam.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/1175/8504/files/jumatabo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5865/8454/files/femuzeriripoxavixusurun.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/0833/4744/files/24927025942.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/6589/2264/files/61804251130.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn 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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00007c23.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7C23 | 7736 bytes |
SHA-256: 1e47d860ae4b0f041a81a6a56b04361a4e3a558e53e6dcc71132f57a2b7472d0 |
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font_01_sfnt_off00009040.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9040 | 5644 bytes |
SHA-256: f1eab49ef09ed228f475743da417a3add55936e5bc8dbf5065690bbade6714c3 |
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font_02_sfnt_off0000a39d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA39D | 16772 bytes |
SHA-256: 8bc4ed4995c95f541df75b2bce7110c4fdd53b4c1521ef2d66ed2c5cfce12bde |
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font_03_sfnt_off0000d839.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD839 | 16100 bytes |
SHA-256: e35eccadac00179dbe2e3b006bf53272e2d1b8c783dbea328c5e4da005a83383 |
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