MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a 'pdf self assessment form' lure, which aligns with the observed link farm behavior. The primary attack pattern involves redirecting users to malicious sites via these embedded links.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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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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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/wb?keyword=pdf%20self%20assessment%20form
- http://files.ouidancema.com/uploads/1/3/1/3/131383533/vigufofoja_fefudomutuj_lamejepipare.pdf
- http://files.saverenodumpsterdiving.com/uploads/1/3/0/7/130775753/243863cd99.pdf
- http://files.asburyumc.net/uploads/1/3/1/3/131380052/suzudiwir.pdf
- https://cdn.shopify.com/s/files/1/0433/9980/7126/files/sejariropajafaxunugutiza.pdf
- https://cdn.shopify.com/s/files/1/0437/2417/7576/files/kagokakeseroluxutevex.pdf
- https://cdn.shopify.com/s/files/1/0432/2466/2173/files/rulowifapixixetelusizese.pdf
- https://cdn.shopify.com/s/files/1/0429/8843/7655/files/meguxakijam.pdf
- https://cdn.shopify.com/s/files/1/0433/4744/3865/files/54162543491.pdf
- https://cdn.shopify.com/s/files/1/0431/7455/9893/files/zamidunofiguvad.pdf
- https://cdn.shopify.com/s/files/1/0437/7768/7701/files/70679340386.pdf
- https://cdn.shopify.com/s/files/1/0438/1471/5549/files/mathematics_quiz_questions_and_answers.pdf
- https://cdn.shopify.com/s/files/1/0431/4241/4492/files/76583712948.pdf
- https://cdn.shopify.com/s/files/1/0431/8117/9029/files/gakunum.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.pdf
- https://cdn.shopify.com/s/files/1/0432/6578/6006/files/27034044895.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00008781.binadd8d944df9bfc382851a6c0c8271a72dcbc6585316fe273ae0487a2c6ed5bae |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8781 | 5052 bytes |
font_01_sfnt_off0000989d.binb94fc2b9efa3acafdd4c82475ab935b3e29f25476fabe3d6a189b8a69d5ee85f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x989D | 10772 bytes |
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